7 found
Sort by:
  1. Denis Barabé, Alain Cuerrier & Angélique Quilichini (2012). Les jardins botaniques : entre science et commercialisation. Natures Sciences Sociétés 20 (3):334-342.
    No categories
    Translate to English
    | Direct download (2 more)  
     
    My bibliography  
     
    Export citation  
  2. Bernard Jeune, Denis Barabé & Christian Lacroix (2006). Classical and Dynamic Morphology: Toward a Synthesis Through the Space of Forms. Acta Biotheoretica 54 (4).
    In plant morphology, most structures of vascular plants can easily be assigned to pre-established organ categories. However, there are also intermediate structures that do not fit those categories associated with a classical approach to morphology. To integrate the diversity of forms in the same general framework, we constructed a theoretical morphospace based on a variety of modalities where it is possible to calculate the morphological distance between plant organs. This paper gives emphasis on shoot, leaf, leaflet and trichomes while ignoring (...)
    Direct download  
     
    My bibliography  
     
    Export citation  
  3. Bernard Jeune & Denis Barabé (1995). Allometry and Geometry Ofbegonia Leaves. Acta Biotheoretica 43 (3).
    The authors constructed an algorithm that relates leaf contour to the ratio between the two parts of the leaf using the function θ’=nθm, wherem is the allometric exponent. Using this model, it is possible to simulate the contour of symmetrical or asymmetrical leaves. The authors hypothesize that the portion of the leaf contour that agrees with the simulation is linked to a constraint imposed by the initial asymmetry of the leaf primordium. The final shape of the leaf results more from (...)
    Direct download  
     
    My bibliography  
     
    Export citation  
  4. Denis Barabé, Stéphane Daigle & Luc Brouillet (1992). On the Interpretation of the Asymmetrical Leaf of Begonia by D'Arcy Thompson. Acta Biotheoretica 40 (4).
  5. Denis Barabé (1991). Chaos in Plant Morphology. Acta Biotheoretica 39 (2).
  6. Denis Barabé & Luc Brouillet (1982). Commentaires Sur le Système de Classification Des Angiospermes de Takhtajan. Acta Biotheoretica 31 (2).
    The authors analyze Takhtajan's system of classification of the Angiosperms in relation to the principles of evolutionary and cladistic systematics. It is shown that Takhtajan belongs to the evolutionary school: he identifies the ancestors of some taxa, he accepts polytomous branching and he groups taxa on the basis of primitive as well as derived character states. Takhtajan's notion of weighted similarity does not appear to be based on objective criteria, when determining the weight and evolutionary status of characters.After a summary (...)
    Direct download  
     
    My bibliography  
     
    Export citation  
  7. Denis Barabé & Joachim Vieth (1979). Le Concept de Fusion En Morphologie Vegetale Chez Payer Et Chez Van Tieghem. Acta Biotheoretica 28 (3).
    The meaning of the concept of fusion is discussed in relation with the works of Payer and those of Van Tieghem. It is pointed out that there is a difference, at the theoretical level, between the concept of fusion congénitale as defined by Payer and the concept of concrescence congénitale formulated by Van Tieghem. The former is inobservable by definition, while the latter deals with intercalary growth. For Van Tieghem, anatomy can prove the existence of fusion, even if we do (...)
    Direct download  
     
    My bibliography  
     
    Export citation