In "The Metamorphosis of Plants" (1790) and the related didactic poem (1798) Goethe describes the generation and development of plants as six metamorphoses of the primal plant and its organ, the leaf. In a first step, I will try to analyze the nature of the primal plant and its organ, the leaf. Is the primal plant and its organ, the leaf, an idea or does it consist in matter? If it is an idea, is it (...) the idea of all plants (the plant), the idea of a particular species of plants, or the idea of the individual plant? If it is matter – which kind of matter? In a second step, I will analyze the generic nature of the primal plant and its organ, the leaf. How does the metamorphosis of plants proceed? Suppose the leaf is A and the parts of the plants are B, C and D. Does A transform into B, C, D by a process from A to B to A, from A to C to A, and from A to D to A; or does A transform into B, proceed from B as B to C, and proceed from C as C to D; or does A transform into B, while remaining at the same time A, and proceed from B as A to C, while remaining at the same time A, and proceed from C as A to D, while remaining at the same time A? Which of these models explains our experience of plant generation and growth and allows a meaningful interpretation of Goethe's mysterious claim that 'All is leaf'? (shrink)

In his accounts of plant and animal generation Pierre Gassendi offers a mechanist story of how organisms create offspring to whom they pass on their traits. Development of the new organism is directed by a material “soul” or animula bearing ontogenetic information. Where reproduction is sexual, two sets of material semina and corresponding animulae meet and jointly determine the division, differentiation, and development of matter in the new organism. The determination of inherited traits requires a means (...) of combining or choosing among each parent's contributions, and towards this end, Gassendi outlines the nature of competition and dominance among animulae. Unlike his fellow mechanists, Gassendi can extend his mechanism to his heredity account, because his proposed vehicle for ontogenetic transmission is material. That proposal in turn relies on his atomist hypothesis. The relative uniformity of atoms allows animulae to operate equivalently across different modes of generation, spontaneous or otherwise. Further, his molecular model of atomic structures allows a material means of storing ontogenetic information received from the souls of parent organisms. These accounts—flawed and sketchy—unsurprisingly fail to specify how hereditary information might be borne physically, and in any case do not meet Gassendi's own empiricist standards. Yet this generation theory with pretensions to a materialist mechanism establishes Gassendi's firm commitment to a unity of the sciences through an atomist ontology that underlies all physical phenomena, including the organic. (shrink)

Anton de Bary is best known for his elucidation of the life cycle of Phytopthora infestans, the causal organism of late blight of potato and the crop losses that caused famine in nineteenth-century Europe. But while practitioner histories often claim this accomplishment as a founding moment of modern plant pathology, closer examination of de Bary’s experiments and his published work suggest that his primary motiviation for pursing this research was based in developmental biology, not agriculture. De Bary shied away (...) from making any recommendations for agricultural practice, and instead focused nearly exclusively on spontaneous generation and fungal development – both concepts promoted through prize questions posted by the Académie des Sciences in the 1850s and 1860s. De Bary’s submission to the Académie’s 1859 Alhumbert prize question illustrates his own contributions to debates about spontaneous generation and demonstrates the practical applications of seemingly philosophical questions – such as the origin of life. (shrink)

Anton de Bary is best known for his elucidation of the life cycle of Phytopthora infestans, the causal organism of late blight of potato and the crop losses that caused famine in nineteenth-century Europe. But while practitioner histories often claim this accomplishment as a founding moment of modern plant pathology, closer examination of de Bary's experiments and his published work suggest that his primary motiviation for pursing this research was based in developmental biology, not agriculture. De Bary shied away (...) from making any recommendations for agricultural practice, and instead focused nearly exclusively on spontaneous generation and fungal development – both concepts promoted through prize questions posted by the Académie des Sciences in the 1850s and 1860s. De Bary's submission to the Académie's 1859 Alhumbert prize question illustrates his own contributions to debates about spontaneous generation and demonstrates the practical applications of seemingly philosophical questions – such as the origin of life. (shrink)

In his De vegetabilibus Albert the Great elaborates a complex physiological explanation in order to describe the vital functions of plants. This explanation is based on some relevant medical doctrines, such as that of radical moisture and digestion, which Albert translates from human into plant physiology. On the basis of these doctrines, Albert develops an intricate system of moistures, by means of which he detailedly explains the generation of each part of plants, such as the leaves, flowers and (...) fruits. In this study, after briefly reconstructing the history of these doctrines, the main aspects of Albert’s plant physiology will be analysed. (shrink)

In his De vegetabilibus Albert the Great elaborates a complex physiological explanation in order to describe the vital functions of plants. This explanation is based on some relevant medical doctrines, such as that of radical moisture and digestion, which Albert translates from human into plant physiology. On the basis of these doctrines, Albert develops an intricate system of moistures, by means of which he detailedly explains the generation of each part of plants, such as the leaves, flowers and (...) fruits. In this study, after briefly reconstructing the history of these doctrines, the main aspects of Albert’s plant physiology will be analysed. (shrink)

ArgumentThe sixteenth-century physician and philosopher Julius Caesar Scaliger suggests that in particular cases plants can come into being that belong to a plant species that did not exist before. At the same time, he holds that God could not have created a more perfect world. However, does the occurrence of new species not imply that the world was not the best possible world from the beginning? In this article, I explore a set of metaphysical ideas that could provide Scaliger (...) with the means of solving this problem: His version of the notion of a plurality of substantial forms in every living being, and his version of the notion of the ordained divine power. As it turns out, Scaliger analyzes the generation of new species in terms of a development of subordinate substantial forms into dominant substantial forms. Thereby, previously existing essences of plant parts become essences of plants. These plants, thus, possess essences that no previously existing plant possessed and, in this sense, belong to a new species. In this way, Scaliger avoids positing the occurrence of new essences, thus saving the best possible world thesis. Moreover, he believes that all substantial forms stand in a relationship of mutual existential dependence by means of which God safeguards the persistence and unity of the world. This is why the agency of subordinate forms turned dominant can be understood as an expression of the ordained power of God. (shrink)

This book assembles recent research on memory and learning in plants. Organisms that share a capability to store information about experiences in the past have an actively generated background resource on which they can compare and evaluate coming experiences in order to react faster or even better. This is an essential tool for all adaptation purposes. Such memory/learning skills can be found from bacteria up to fungi, animals and plants, although until recently it had been mentioned only as capabilities of (...) higher animals. With the rise of epigenetics the context dependent marking of experiences on the genetic level is an essential perspective to understand memory and learning in organisms. -/- Plants are highly sensitive organisms that actively compete for environmental resources. They assess their surroundings, estimate how much energy they need for particular goals, and then realize the optimum variant. They take measures to control certain environmental resources. They perceive themselves and can distinguish between ‘self’ and ‘non-self’. They process and evaluate information and then modify their behavior accordingly. -/- The book will guide scientists in further investigations on these skills of plant behavior and on how plants mediate signaling processes between themselves and the environment in memory and learning processes. (shrink)

Formal methods for representing the characteristic features of organic development and growth make it possible to map the large-scale teleological structure of organic activity. This provides a basis for semantically evaluating, or providing a theory of meaning for, talk of organic activity as purposive. For the processes of organic generation and growth are subjunctively robust under a variety of influences characteristic for the kind or species in question, and these subjunctive conditions can be displayed in a two-dimensional array. (...) After motivating and introducing this array, I use its two dimensions to partially account for features of the purposiveness characterizing two sets of exemplars of the plant and animal kingdoms: ferns and cacti, and cheetah and gazelle. The result is a formal framework for interpreting talk of organic activity as purposive, able to be adapted to a range of research traditions in the philosophy of language and the philosophy of biology. (shrink)

This study was developed around concerns about how indigenous knowledges have been represented and applied in environment and development education. The first phase of the study is a genealogical analysis after Michel Foucault. This probes representations and applications of plant-based indigenous knowledge in selected anthropological, botanical and environmental education texts in southern Africa. The emerging insights were deepened using a Social Realism vantage point after Margaret Archer to shed light on agential issues in environmental education and development (...) contexts. Here her morphogenetic/morphostatic analysis of social transformation or reproduction is used to trace changes in indigenous knowledge representations and applications over time . The second phase uses the same perspectives and tools to extend the analysis of power/knowledge relationships into the interface of indigenous communities and modern institutions in two case study settings in the Eastern Cape of South Africa. This study reveals colonially-derived hegemonic processes of modern/Western scientific institutional representations/interpretations of the knowledges of indigenous communities. It also tracks a continuing trajectory of their dominating and prescriptive mediating control over local knowledges from the pre-colonial context through into the post-colonial period in southern Africa. The analysis reveals how this hegemony is sustained through the deployment of institutional strategies of representation that transform local knowledges into the disciplinary knowledge discourses of modern scientific institutions. These representational strategies therefore generate/reproduce and validate disciplinary discourses about the other, constructing disciplinary 'regimes of truth'. In this way modern institutions appropriate and displace indigenous/local knowledges, silence the voices of local communities and regulate individual and community agency within a continuing subjugation of indigenous knowledges. This study reveals how working within modern institutions and disciplinary knowledges in participative education and development interactions can serve to implicate indigenous researchers in these institutional hegemonic processes. The study also notes evidence of a continued resistance to hegemonic Western knowledge discourses as indigenous communities have sustained many knowledge practices alongside Western knowledge discourses. There is also evidence of a recent emergence of counter-hegemonic indigenous knowledge discourses in environmental education and development practices in southern Africa. It is noted that these have been contingent upon the changing political terrain in southern Africa as this has opened the way for alternative discourses to the dominant conventional Western knowledges in formal education and development contexts. The counterhegemonic discourses invert power/knowledge relations, decentre hegemonic discourses and reposition indigenous knowledges in formal education and development contexts. This study suggests the need to foreground indigenous knowledges as a process of knowledge decolonisation that gives contextual and epistemic relevance to environmental education and development processes. This calls for a need for new strategies to transform existing institutions by creating enabling spaces for the representational inclusion of indigenous knowledges in formal/conventional knowledge discourses and their application in social contexts. This opens up possibilities for plural knowledge representations and for their integrative and reciprocal co-engagement in situated contexts of environmental education and development in southern Africa. (shrink)

Governments and non-govermental organizations (NGOs) that plan projects to conserve the environment and alleviate poverty often attempt to modify rural livelihoods by halting activities they judge to be destructive or inefficient and encouraging alternatives. Project planners typically do so without understanding how rural people themselves judge the value of their activities. When the alternatives planners recommend do not replace the value of banned activities, alternatives are unlikely to be adopted, and local people will refuse to participate. Human behavioral ecology and (...) behavioral economics may provide useful tools for generating and evaluating hypotheses for how people value economic activities in their portfolios and potential alternatives. This is demonstrated with a case example from southwestern Madagascar, where plans to create a Mikea Forest National Park began with the elimination of slash-and-burn maize agriculture and the encouragement to plant labor-intensive manioc instead. Future park plans could restrict access to wild tuber patches, hunting small game, and fishing. The value of these activities is considered using observational data informed by optimal foraging theory, and experimental data describing people’s time preference and covariation perception. Analyses suggest that manioc is not a suitable replacement for maize for many Mikea because the two crops differ in terms of labor requirements, delay-to-reward, and covariation with rainfall. Park planners should promote wild tuber foraging and stewardship of tuber patches and the anthropogenic landscapes in which they are found. To conserve small game, planners must provide alternative sources of protein and cash. Little effort should be spent protecting lemurs, as they are rarely eaten and never sold. (shrink)

Since ancient times comparisons between embryonic forms of humans, animals, and plants are known. In deciphering a plant embryo and its development, one applied a specific zoomorphic terminology. Until the 17th century naturalists who studied plants were inspired by the concepts of ancient natural philosophy. Since then plant embryos are visualized by drawings and diagrammatic sketches. In the 18th century the embryo became an important issue in debates concerning theories of generation and the analogy between animal (...) egg and vegetable seed was emphasized. Due to the cell theory and refined microscopic techniques around 1850 botanists described the 'plant embryo' as an aggregate of cells. The 20th century profited of further technical improvements, e.g. microphotography, SEM, and plant tissue culture. The spell of the word embryo integrated morphological and morphogenetic data in botany and served as a code to decipher botanic forms. The paper presents a short history of the concept of 'plant embryo' and focuses on its distinct meanings over centuries, supported by different images. (shrink)

The aim of this paper is to determine whether the present generation should preserve non-human living things for future generations, even if in the future all the contributions these organisms currently make to human survival in decent conditions were performed by adequate technology and future people's preferences were satisfied by this state of affairs. The paper argues it would be wrong to leave a world without non-human living plants, animals and other organisms to future generations, because such a world (...) would fail to secure one of the conditions of future people’s autonomy, that is, availability of adequate options. Building upon Joseph Raz’s account of autonomy, the paper shows that the presence of non-human living organisms is part of an adequate range of options insofar as, to be adequate, options must meet a test of variety. According to Raz, options pass this test if they enable human agents to exercise a set of physical, affective, imaginative and cognitive capacities humans normally have an innate drive to exercise. The paper discusses empirical findings as well as psychological theories that provide support to the hypothesis that interactions with non-human living organisms enable human beings to develop and exercise these capacities by shaping these capacities in a special way, different from the way interactions with other environments do. (shrink)

The theory of spontaneous generation was developed by Aristotle, mainly in his biological works. In Aristotle, this issue was linked with some significant doctrines, such as that of pneuma. In medieval thought, the theory was known as generatio ex putrefactione. Albert the Great addresses it not only to explain the generation of certain animals, such as insects, but also to elucidate the generation of certain plants. Moreover, in Albert the Great’s De vegetabilibus, putrefaction is conceived as a (...) process that simply pertains to the life of plants: putredo is one of the three principles of plant generation, meaning that plants need putrefaction to germinate and grow, even if seeds initially bring them about. In Albert’s explanation, there is only a thin line between spontaneous and conventional generation in plants, so that putrefaction and generation are two symbiotic concepts in the vegetal world. (shrink)

This paper examines classification practices in the domain of plant data semantics, and particularly methods used to label plant traits to foster the collection, management, linkage and analysis of data about crops across locations—which crucially inform research and interventions on plants and agriculture. The efforts required to share data place in sharp relief the forms of diversity characterizing the systems used to capture the biological and environmental characteristics of plant variants: particularly the biological, cultural, scientific and semantic (...) diversity affecting the identification and description of plant traits, the methods used to generate and process data, and the goals and skills of those with relevant expertise—including farmers and breeders. Through a study of the Crop Ontology (which explicitly recognizes and negotiates diversity) and its application to cassava breeding, I argue for a process-sensitive approach to the naming of plant traits that focuses on documenting environmental processes instead of biological products. I claim that this approach can foster reliable linkage and robust re-use of plant data, while at the same time facilitating dialogue between data scientists, plant researchers, breeders, and other relevant experts in ways that crucially inform agricultural interventions. I conclude that the study of data semantics and related descriptors constitutes a productive and underexplored way to think about the epistemic import of naming traits within plant science. The effort to articulate semantic differences among plant varieties and methods of data processing can generate newly inclusive ways to develop and communicate biological knowledge. In turn, such practices have the potential to defy existing understandings of systematisation and hierarchies of expertise in biology, thus bolstering the extent to which plant science can support biodiversity and sustainable agriculture. (shrink)

Uncultivated plants are an important part of agricultural systems and play a key role in the survival of rural marginalized groups such as women, children, and the poor. Drawing on the gender, environment, and development literature and on the notion of women’s social location, this paper examines the ways in which gender, ethnicity, and economic status determine women’s roles in uncultivated plant management in Ixhuapan and Ocozotepec, two indigenous communities of Veracruz, Mexico. The first is inhabited by Nahua (...) and the second by Popoluca peoples. Information was gathered through group and individual interviews and a food frequency survey. Results show that the gender ideology prevailing in each community, resulting from distinct ethnic affiliations and economic contexts, shapes women’s plant management. In Ixhuapan, Nahua women are used to leaving their community to generate income, while in Ocozotepec men are considered the main breadwinners and are the mediators between Popoluca households and the larger society. Nahua women gather quelites at the cornfields more often than their men, and more often than their female counterparts in Ocozotepec. They also manage and sell plants from their homegardens at higher percentages than Popoluca women. However, women in both communities use intensely the plants of their homegardens and play a key role in biodiversity conservation and cultural permanence. (shrink)

Vietnam is a vibrant and emerging South East Asian economy. However, the country faces a challenging task in meeting rising energy demand and the need to securitize energy while addressing the negative environmental impact of fossil fuel utilization. Growing concerns about sustainable development have led Vietnam to develop civilian nuclear energy for electricity generation. Nuclear power is widely recognized as a clean, mature and reliable energy source. Its inclusion in Vietnam’s energy mix by 2030 is expected to supplement (...) other energy sources from fossil fuel, hydropower plants, renewable resources and energy imports. Despite strong reservations in the aftermath of the Fukushima disaster, Vietnam has pursued its national nuclearization program. Civilian nuclear energy development has been widely regarded as a controversial issue, although it is intended for peaceful purposes and as a solution for long-term energy security. Anxiety over nuclear safety measures, inadequate nuclear regulatory mechanisms, lack of institutionalized radioactive waste management, the threat of nuclear accident, theft and terrorism, and nuclear proliferation have marred public perception. The apprehension towards nuclear energy development has raised serious questions on the ethics and risks of the technology. Using a qualitative approach of reviewing published scholarly research, we investigated the ethical and risk issues that manifest in civilian nuclear energy development in Vietnam. Our findings reveal that the conundrum of civilian nuclear energy revolves around balancing energy security, environment preservation and societal well-being with ethical and risk predicaments of nuclear energy. (shrink)

This book develops the term 'Sustainable Innovations' and defines it on the basis of plant variety innovations that, by their very nature, (i) permit the in situ conservation of agrobiodiversity and genetic variability in diverse geographic and climatic conditions, (ii) do not exclude any potential innovators from the process of innovation, and thereby (iii) ensure that both formal and informal innovations can continue to take place in the generations to come (in both the developed and developing world). The book (...) studies the Indian Plant Variety Protection Act, the UPOV Acts and associated agricultural policies from a legal, philosophical, historical and economic perspective with the aim of determining the means of promoting sustainable innovations in plant varieties and identifying laws, policies and practices that are currently acting as impediments to promoting the same. (shrink)

An existing industrial hydrogen generation and distribution infrastructure is described, and a number of large-scale investment projects are outlined. All of these projects have the potential to generate significant volumes of low-cost, low-carbon hydrogen. The technologies concerned range from gasification of coal with carbon capture and storage to gasification of a range of biomass streams. These biomass streams derive in turn from the supply chains that feed large liquid biofuel production plants—some operational and the others under construction. Having described (...) how such developments are coming together in a particular location to allow accelerated movement toward a hydrogen economy, this article explores the conditions under which similar acceleration could be seen in other locations. (shrink)

Darwin's ideas on variation, heredity, and development differ significantly from twentieth-century views. First, Darwin held that environmental changes, acting either on the reproductive organs or the body, were necessary to generate variation. Second, heredity was a developmental, not a transmissional, process; variation was a change in the developmental process of change. An analysis of Darwin's elaboration and modification of these two positions from his early notebooks (1836-1844) to the last edition of the /Variation of Animals and Plants Under Domestication/ (...) (1875) complements previous Darwin scholarship on these issues. Included in this analysis is a description of the way Darwin employed the distinction between transmission and development, as well as the conceptual relationship he saw between heredity and variation. This paper is part of a larger project comparing commitments regarding variation during the latter half of the nineteenth century. (shrink)

Parents influence the development of their offspring in many ways beyond the transmission of DNA. This includes transfer of epigenetic states, nutrients, antibodies and hormones, and behavioural interactions after birth. While the evolutionary consequences of such nongenetic inheritance are increasingly well understood, less is known about how inheritance mechanisms evolve. Here, we present a simple but versatile model to explore the adaptive evolution of non-genetic inheritance. Our model is based on a switch mechanism that produces alternative phenotypes in response (...) to different inputs, including genes and non-genetic factors transmitted from parents and the environment experienced during development. This framework shows how genetic and non-genetic inheritance mechanisms and environmental conditions can act as cues by carrying correlational information about future selective conditions. Differential use of these cues is manifested as different degrees of genetic, parental or environmental morph determination. We use this framework to evaluate the conditions favouring non-genetic inheritance, as opposed to genetic determination of phenotype or within-generation plasticity, by applying it to two putative examples of adaptive non-genetic inheritance: maternal effects on seed germination in plants and transgenerational phase shift in desert locusts. Our simulation models show how the adaptive value of non-genetic inheritance depends on its mechanism, the pace of environmental change, and life history characteristics. (shrink)

This paper explores the role of African worldviews in biodiversity conservation and sustainable development. African worldviews recognise the interdependence and interconnectedness of human beings, animals, plants and the natural world. Although it is not always the case that what one does depends on what one thinks and believes, indigenous African people's ideas and beliefs about the human-nature relationship have influenced what they have done in and to nature. In African worldviews, the present generation has moral obligations to the (...) ancestors and future generations. It ought to preserve the environment, which is rich in biodiversity, for posterity. This paper insists that it is extremely urgent that every effort be made to document the knowledge of peasant farmers and indigenous people in general. This paper further stresses that indigenous environmental knowledge makes a big difference to sustaining diverse environments, and it is imperative to preserve such knowledge before it dies out. (shrink)

Analysis of a diverse cross‐sample of plant‐insect interactions suggests that the abundance of vitamin C (L‐ascorbic acid, ascorbate or AsA) in plants influences their susceptibility to insect feeding. These effects may be mediated by AsAs roles as an essential dietary nutrient, as an antioxidant in the insect midgut, or as a substrate for plant‐derived ascorbate oxidase, which can lead to generation of toxic reactive oxygen species. Ascorbate can also influence the efficacy of plant defenses such as (...) myrosinases and tannins, and alter insects' susceptibility to natural enemies. Conversely, herbivores appear to influence both de novo synthesis and redox cycling of AsA in their host plants, thereby potentially altering the nutritional value of crops and their susceptibility to pests. The recent development of genetically modified crops with enhanced AsA content provides both an impetus and a tool set for further studies on the role of AsA in plant‐insect interactions. (shrink)

In eukaryotes, folate metabolism is compartmentalized between the cytoplasm and organelles. The folate pathways of mitochondria are adapted to serve the metabolism of the organism. In yeast, mitochondria support cytoplasmic purine synthesis through the generation of formate. This pathway is important but not essential for survival, consistent with the flexibility of yeast metabolism. In plants, the mitochondrial pathways support photorespiration by generating serine from glycine. This pathway is essential under photosynthetic conditions and the enzyme expression varies with photosynthetic activity. (...) In mammals, the expression of the mitochondrial enzymes varies in tissues and during development. In embryos, mitochondria supply formate and glycine for purine synthesis, a process essential for survival; in adult tissues, flux through mitochondria can favor serine production. The differences in the folate pathways of mitochondria depending on species, tissues and developmental stages, profoundly alter the nature of their metabolic contribution. BioEssays 28: 595–605, 2006. © 2006 Wiley Periodicals, Inc. (shrink)

In twenty important passages located throughout De rerum natura, Lucretius refers to natural things happening spontaneously (sponte sua; the Greek term is automaton). The most important of these uses include his discussion of the causes of: nature, matter, and the cosmos in general; the generation and adaptation of plants and animals; the formation of images and thoughts; and the behavior of human beings and the development of human culture. In this paper I examine the way spontaneity functions as (...) a cause in other Greek and Latin writers, beginning with Homer and Hesiod, and including Herodotus, Thucydides, Xenophon, Plato, Aristotle, and Theophrastus; among Latin writers Cicero, Pliny, Horace, Vergil and Ovid. I argue that the most important influence (immediately or via Epicurus) on Lucretius’ concept and use of this cause is the natural philosophy of Democritus and his followers and critics. I argue that understanding the nature of spontaneity, and how it differs from chance, is crucial to understanding Lucretius’ account of the cosmos and nature, and also how some of the actions of humans and other animals are “free” and “voluntary”. For in the famous passage at II.251-293 he contrasts free action with action caused or constrained by external forces and outside influences. (shrink)

Third World countries are not pursuing scientific and technological policies leading to the development of strong biotechnological industries. Their leaders have been misled into believing that modern biotechnological industries can be built in the absence of strong, intellectually aggressive, and original scientific schools. Hence, they do not strive to reform their universities, which have weak commitments to research, and do not see the importance of having research hospitals able to generate excellent and relevant clinical investigation. These strategic gaps in (...) scientific capability, the lack of governmental and corporate research funding, and the dependent nature of the chemical and pharmaceutical industries of the Third World make the development of competitive biotechnology a highly improbable event. If the present trend continues, underdeveloped countries will continue to be testing grounds for biological materials and agents, sources of valuable germplasm, and markets for high-value-added products and processes invented and manufactured in the First World. This article recommends that the international organizations collaborate in the urgent task of educating the Third World political leaders and administrators in the real problems connected with the generation of high technology. (shrink)

We argue that the physics of complex materials and self-organizing processes should be made central to the biology of form. Rather than being encoded in genes, form emerges when cells and certain of their molecules mobilize physical forces, effects, and processes in a multicellular context. What is inherited from one generation to the next are not genetic programs for constructing organisms, but generative mechanisms of morphogenesis and pattern formation and the initial and boundary conditions for reproducing the specific traits (...) of a taxon. There is no inherent antagonism between this “physicalist” perspective and genetics, since physics acts on matter, and gene products are essential material components of living systems whose variability affects the systems’ parameters. We make this notion concrete by summarizing the concept of “dynamical patterning modules” (DPMs; Newman and Bhat, Phys Biol 5:1–14, 2008; Int J Dev Biol 53:693–705, 2009), an explicit physico-genetic framework for the origin and evolution of multicellular form in animals, as well as (when differences in interaction toolkit genes and applicable physical processes are taken into account) in multicellular plants (Hernández-Hernández et al., Int J Dev Biol 56:661–674, 2012). DPMs provide the missing link between development and evolution by revealing how genes acting in concert with physics can generate and transform morphology in a heritable fashion. (shrink)

Proposes an innovative rethinking of Aristotle’s work as a system that integrates his theology with his doctrine of reproduction and life. In this deep rethinking of Aristotle’s work, Abraham P. Bos argues that scholarship on Aristotle’s philosophy has erred since antiquity in denying the connection between his theology and his doctrine of reproduction and life in the earthly sphere. Beginning with an analysis of God’s role in the Aristotelian system, Bos explores how this relates to other elements of his philosophy, (...) especially to his theory of reproduction. The argument he develops is that in talking about the cosmos, Aristotle rejected Plato’s metaphor of artisanal production by a divine Demiurge in favor of a biotic metaphor based on the transmission of life in reproduction, in which pneuma—not breath as it is often interpreted but the life-bearing spirit in animals and plants—plays a key and sustaining role as the vital principle in all that lives. In making this case, he defends the authenticity of the treatises De Mundo and De Spiritu as Aristotle’s, and demonstrates Aristotle’s works as a unified system that sharply and comprehensively refutes Plato’s, and in particular replaces Plato’s doctrine of the soul with a theory in which the soul is clearly distinguished from the intellect. “Bos offers a fresh, interesting, and important perspective. His interpretation will be very controversial, but if he is right, the standard Anglo-American interpretation of Aristotle will have to change radically.” — Malcolm Wilson, author of Structure and Method in Aristotle’s Meteorologica: A More Disorderly Nature. (shrink)

In this article, we argue that scientists and technologists associated with the nuclear industry are building support for small modular reactors by advancing five rhetorical visions imbued with elements of fantasy that cater to various social expectations. The five visions are as follows: a vision of risk-free energy would eliminate catastrophic accidents and meltdowns. A vision of indigenous self-energization would see SMRs empowering remote communities and developing economies. A vision of water security would see SMR-powered desalination plants satisfying the world’s (...) water needs. A vision of environmental nirvana would see SMRs providing waste-free and carbon-free electricity to preserve the earth’s biosphere. A vision of space exploration would see SMRs assisting in the colonization of the moon, Mars, and possibly other worlds. These visions help create a symbolic convergence among promoters, serving to attract political and financial support, and erasing previous nuclear failures from public discourse. Moreover, underlying these visions is a technological utopian ideal world where SMRs would generate plentiful energy of multiple kinds, offering the necessary means for a life of comfort for all people by meeting various needs and without any environmental externalities or cause for concern about accidents. (shrink)

A unique feature of flowering plants is their ability to produce organs continuously, for hundreds of years in some species, from actively growing tips called apical meristems. All plants possess at least one form of apical meristem, whose cells are functionally analogous to animal stem cells because they can generate specialized organs and tissues. The shoot apical meristem of angiosperm plants acts as a continuous source of pluripotent stem cells, whose descendents become incorporated into organ primordia and acquire different fates. (...) Recent studies are unveiling some of the molecular pathways that specify stem cell fate in the center of the shoot apical meristem, that confer organ founder cell fate on the periphery, and that connect meristem patterning elements with events at the cellular level. The results are providing important insights into the mechanisms through which shoot apical meristems integrate cell fate decisions with cellular proliferation and global regulation of growth and development. BioEssays 24:27–37, 2002. Published 2002 John Wiley & Sons, Inc. (shrink)

Disturbance-generated biomass results from endogenous and exogenous natural and cultural disturbances that affect the health and productivity of forest ecosystems. These disturbances can create large quantities of plant biomass on predictable cycles. A systems analysis model has been developed to quantify aspects of system capacities (harvest, transportation, and processing), spatial aspects of the biomass generation process, and deterioration impacts on biomass quality in the various inventory states (field stands, field-harvested inventories, transportation prepared inventories, and production facility inventories). Optimal (...) decision alternatives can be used to guide responses to reclamation, utilization, mitigation, and control. This is particularly advantageous in insect and disease outbreaks, in which the process may last several years, with varying levels of intensity. The prescriptive system description, assuming capacities are fixed, results in a linear programming model. The time-dependent capacity decision model results in a mixed-integer programming model. The analytical model is developed in detail in this analysis. (shrink)

It has recently been asserted that legislative moves to consider plants as ethical subjects are philosophically foolish because plants lack autonomy. While by no means the sole basis or driving criterion for moral behavior, it is possible to directly challenge skeptical attitudes by constructing a human-plant ethics centered on fundamental notions of autonomy. Autonomous beings are agents who rule themselves, principally for their own purposes. A considerable body of evidence in the plant sciences is increasingly recognizing the capacity (...) of plants to assess, perceive, and act on their environment. The primary purpose of their doing so is to generate the conditions for their own flourishing. With these plant purposes in mind, it is evidentially inappropriate to treat plants purely as instruments. In this age of environmental crisis, knowledge of plant intelligence and autonomy opens up a new debate on respecting and promoting the well-being of the plants that make life on Earth possible. (shrink)

The article reevaluates the reception of Mendelism in France, and more generally considers the complex relationship between Mendelism and plant breeding in the first half on the 20th century. It shows on the one side that agricultural research and higher education institutions have played a key role in the development and institutionalization of genetics in France, whereas university biologists remained reluctant to accept this approach on heredity. But on the other side, plant breeders, and agricultural researchers, despite (...) an interest in Mendelism, never came to see it as the breeders' panacea, and regarded it instead as of only limited value for plant breeding. I account for this judgment in showing that the plant breeders and Mendelism designed two contrasting kinds of experimental systems and inhabited distinct experimental cultures. While Mendelian geneticists designed experimental systems that allowed the production of definite ratios of different forms that varied in relation to a few characters, plant breeders' experimental systems produced a wide range of variation, featuring combinations between hundreds of traits. Rather than breaking this multiple variation down into simple elements, breeders designed and monitored a genetic lottery. The gene was a unit in a Mendelian experimental culture, an "epistemic thing" as Rheinberger put it, that could be grasped by means of statistical regularities, but it remained of secondary importance for French plant breeders, for whom the strain or the variety -- not the gene -- was the fundamental unit of analysis and manipulation. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Literature 27.2 (2003) 456-470 [Access article in PDF] Ethics without Exit:Levinas and Murdoch Bob Plant Hearts open very easily to the working class, wallets with more difficulty. What opens with the most difficulty of all are the doors of our own homes. —Emmanuel Levinas, Nine Talmudic Readings... there is no debt to acquit. From the outset, I am not exonerated. I am originally in default. —Emmanuel (...) Levinas, God, Death, and TimeIN HIS RECENT ARTICLE "Emmanuel Levinas and Iris Murdoch: Ethics as Exit?," C. Fred Alford highlights a number of insightful comparisons—and many important contrasts—between the respective conceptions of ethics proffered by Levinas and Murdoch. Alford's avowed objective is to "criticize Levinas sympathetically," or to "disrupt" what has come to be known as "the Levinas Effect" and the tendency of many commentators to make Levinas "become everything to everyone." 1 Given what one commentator calls "the facile 'postmodern' temptation to lump together all differences under the general rubric of the 'Other,'" 2 Alford's objective is, I believe, wholly commendable. (As Arthur Schopenhauer pithily remarks: "the man who is everyone's friend is no one's friend." 3) Nevertheless, in the following discussion I want to "disrupt" Alford's own reading of Levinas; not, I hope, to make the latter simply a conduit for saying "whatever.... [I] wanted to say in the first place" (p. 24), but to present a fuller picture of Levinas's singularly difficult, evocative and often puzzling philosophy. I shall do this by critically responding to and developing a number of points [End Page 456] Alford explicitly raises. To what extent my reading of Levinas aligns him with Murdoch, I leave for others far better qualified to assess.Let us be clear from the start, Levinas is—as Hilary Putnam rightly notes—a "moral perfectionist." 4 But this is not to say that Levinas's work is "otherworldly." Although Alford does not use this latter term, it is clearly implied in his analysis. Thus, contrasting Levinas and Murdoch, he remarks that, "like Levinas, Murdoch's goal is to go beyond the limits of the self. Unlike Levinas, Murdoch is content to remain within a world of beings" (p. 37), and likewise, that Murdoch wants us to "climb the ladder of love only high enough to be free of their vanity and egoism, but never so high as to leave the world behind" (p. 38). According to Alford, "the other is an abstraction for Levinas.... Only at a distance is the other abstract enough to remind us of infinity" (p. 25)—indeed, a "barely contained passion for otherness, exit, and transcendence runs through Levinas" (p. 40). In a similar vein we are told that, for Levinas, "the self is remarkably real, a tangible fleshy thing.... and a barrier to infinity," and it is "for this reason,... a shattering experience is necessary, like that of Saul on the road to Damascus, an experience that does not bring me closer to my deliverer.... Only this can open me up—not to reality, but to infinity" (p. 38). More pointedly still, Alford asserts: "Levinas was never interested in the concrete reality of the other person, whose fleshy reality can only get in the way of transcendence" (p. 37). Thus, although he acknowledges that Levinas "often writes about ethical relationships as though they were real relationships with real people" ("what is not true is that Levinas is talking about some Other more august and transcendent than real other people.... we know the infinite only through other people"), Alford nevertheless defends his own "turning to Murdoch" on the grounds that she is "a theorist who remains strictly within the realm of everyday life, finding there subtleties of knowing, caring, and being that Levinas believes come only by way of the infinite" (p. 34).While Levinas's attitude toward the "everyday" or "ordinary" is hardly transparent (after all, the imperative of the other's face is said to come "from most high outside the world" 5 ), Alford overstates the "otherworldly" aspect of the former's ethics. Against the allegation that Levinas... (shrink)

To generate explanatory theory, ecologists must wrestle with how to represent the extremely many, diverse causes behind phenomena in their domain. Early twentieth-century plant ecologists Frederic E. Clements and Henry A. Gleason provide a textbook example of different approaches to explaining vegetation, with Clements allegedly committed, despite abundant exceptions, to a law of vegetation, and Gleason denying the law in favor of less organized phenomena. However, examining Clements's approach to explanation reveals him not to be expressing a law, and (...) instead to be developing an explanatory structure without laws, capable of progressively integrating causal complexity. Moreover, Clements and Gleason largely agree on the causes of vegetation; but, since causal understanding here underdetermines representation, they differ on how to integrate recognized causes into general theory---that is, in their methodologies. Observers of the case may have mistakenly assumed that scientific representation across the disciplines typically aims at laws like Newton's, and that representations always reveal scientists' metaphysical commitments. Ironically, in the present case, this assumption seems to have been made even by observers who regard Clements as naı¨ve for his alleged commitment to an ecological law. (shrink)

I formulate a Deweyan argument for school gardening that prepares students for a specific type of gardening activism: community gardening, or the political activity of collectively organizing, planting and tending gardens for the purposes of food security, education and community development.

In 1981, after 20 years of teaching and writing philosophy, Derrida claimed that ‘less than ever’ did he ‘know what philosophy is’. Indeed, his ‘knowledge of what ... constitutes the essence of philosophy’ remained ‘at zero degree’. 1 These were not flippant remarks. Rather, Derrida’s avowed uncertainty is part of a more general metaphilosophical view; namely, that ‘Philosophy has a way of being at home with itself that consists in not being at home with itself’. 2 In this article I (...) will critically reconstruct and develop this view, paying particular attention to the ‘institutional’ dimension of contemporary philosophy. (shrink)

Religiously affiliated colleges and universities typically take spiritual formation and soul care very seriously and are usually intentional about the spiritual and religious development of not only their students but of their faculty and staff as well. The religious tradition, size of the campus community, financial and other resources, along with the will of senior administrators, donors, trustees, and the general university community all determine how these interests and agendas are nurtured and developed as well as the kinds of (...) programing offered. The purpose of this article is to highlight the strategies to support and nurture spiritual formation and soul care at Santa Clara University, a Catholic and Jesuit university in the heart of Silicon Valley, with elements of this care found at most, if not all, Jesuit higher education institutions throughout the nation and world. At Santa Clara, the Ignatian Center is the primary, although not the only, home for these spiritual formation and soul care offerings and will be highlighted here. (shrink)

Plant succession is a phenomenon ascribed to vegetation dynamics at the scale of the plant community. The study of plant succession implies the analysis of the species involved and their relationships. Depending on the research done, the characteristics of trees have been studied according to either static, dimensional or partial approaches. We have revised the principal theories of succession, the methods of describing structure and development of tree and relationship established between tree species' attributes and their (...) successional status. During studies of succession, we propose that the profile of plant species be completed by including the organizational attributes of their structure as well as their development dynamics. We suggest an approach to the architecture that gives a general overview of the mode of development, revealing, among other things, that a limited number of architectural models may be found in nature. We hypothesize that community dynamics, in succession, may to a certain degree arise from the dynamic nature of plant development. This line of reasoning is in accordance with the current school of thought on process structuralism. (shrink)

This chapter develops the idea that the germ-soma split and the suppression of individual fitness differences within the corporate entity are not always essential steps in the evolution of corporate individuals. It illustrates some consequences for multilevel selection theory. It presents evidence that genetic heterogeneity may not always be a barrier to successful functioning as a higher-level individual. This chapter shows that levels-of-selection theorists are wrong to assume that the central problem in transitions is always that of minimizing within-group competition. (...) Evidence of intralevel conflict does not qualify as evidence against the existence of a higher level of selection. (shrink)

In "The Myth of Sisyphus", Camus recommends scornful defiance in the face of our absurd, meaningless existence. Although Nagel agrees that human life possesses an absurd dimension, he objects to Camus' existentialist 'dramatics'. For Nagel, absurdity arises from the irreducible tension between our subjective and objective perspectives on life. In this paper I do two things: (i) critically reconstruct Camus' and Nagel's positions, and (ii) develop Nagel's critique of Camus in order to argue that humour is an appropriate response to (...) absurdity. (shrink)

The new mythology for which the German Romantic period called was not envisioned as antithetical to empiricism or experiential/experimental knowledge, but rather as emerging in dialogue with it to form a cultural foundation for such inquiry. Central to the mytho-scientific project were problematic theories of sexual division and generativity that established cultural baselines. This article examines the mythological investments of two influential thinkers of the period—Goethe and Schelling. It then analyzes Goethe’s unique merger of mythological approaches to sex and (...) class='Hi'>generation with empirical observation in The Metamorphosis of Plants. It next traces Schelling’s expansion of Goethe’s theories of nature beyond their empirical justifications to develop a metaphysics of sexual differentiation. Finally, the article illuminates Goethe’s final reply to the sexual dynamics of Naturphilosophie at the end of his life, through the analysis of a single poem, “Finding Again,” in the collection God and World. Ultimately and in spite of its empirical commitments, Goethe’s more flexible view of sexual correlations would lose ground to the powerful metaphysical mythology of sexual opposition as both scientific and cultural bedrock. (shrink)

The development of improved methods for genome‐wide association studies (GWAS) for genetics of quantitative traits has been an active area of research during the last 25 years. This activity initially started with the use of mixed linear model (MLM), which was variously modified. During the last decade, however, with the availability of high throughput next generation sequencing (NGS) technology, development and use of pangenomes and novel markers including structural variations (SVs) and k‐mers for GWAS has taken over (...) as a new thrust area of research. Pangenomes and SVs are now available in humans, livestock, and a number of plant species, so that these resources along with k‐mers are being used in GWAS for exploring additional genetic variation that was hitherto not available for analysis. These developments have resulted in significant improvement in GWAS methodology for detection of marker‐trait associations (MTAs) that are relevant to human healthcare and crop improvement. (shrink)

Plant hormones are signalling molecules that control growth and development. Growth of the aerial parts of higher plants requires the continuous activity of the shoot apical meristem, a small mound of cells at the apex of a plant. KNOTTED1‐like HOMEOBOX (KNOX) genes are involved in regulating meristem activity, however, little is known about how this regulation is mediated. Recent evidence suggests that KNOX transcription factors may control meristem development by regulating the balance of activities of multiple (...) hormones. BioEssays 26:395–404, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

How micro- and macroevolutionary evolutionary processes produce phenotypic change is without question one of the most intriguing and perplexing issues facing evolutionary biologists. We believe that roadblocks to progress lie A) in the underestimation of the role of the environment, and in particular, that of the interaction of genotypes with environmental factors, and B) in the continuing lack of incorporation of development into the evolutionary synthesis. We propose the integration of genetic, environmental and developmental perspectives on the evolution of (...) the phenotype in the form of the concept of the developmental reaction norm (DRN) The DRN represents the set of multivariate ontogenies that can be produced by a single genotype when it is exposed to environmental variation. It encompasses: 1) the processes that alter the phenotype throughout the ontogenetic trajectory, 2) the recognition that different aspects of the phenotype are (and must be) correlated and 3) the ability of a genotype to produce phenotypes in different environments. This perspective necessitates the explicit study of character expression during development, the evaluation of associations between pairs or groups of characters (e.g., multivariate allometries), and the exploration of reaction norms and phenotypic plasticity. We explicitly extend the concept of the DRN to encompass adjustments made in response to changes in the internal environment as well. Thus, ‘typical’ developmental sequences (e.g., cell fate determination) and plastic responses are simply manifestations of different scales of ‘environmental’ effects along a continuum. We present: (1) a brief conceptual review of three fundamental aspects of the generation and evolution of phenotypes: the changes in the trajectories describing growth and differentiation (ontogeny), the multivariate relationships among characters (allometry), and the effect of the environment (plasticity); (2) a discussion of how these components are merged in the concept of the developmental reaction norm; and (3) a reaction norm perspective of major determinants of phenotypes: epigenesis, selection and constraint. (shrink)