Reponses a Des signaux mecaniques: Communications inter et intracellulaires chez Les vegetaux

Acta Biotheoretica 39 (3-4) (1991)
In their environment, plants are continuously submitted to natural stimuli such as wind, rain, temperature changes, wounding, etc. These signals induce a cascade of events which lead to metabolic and morphogenetic responses.In this paper the different steps are described and discussed starting from the reception of the signal by a plant organ to the final morphogenetic response. In our laboratory two plants are studied: Bryonia dioica for which rubbing the internode results in reduced elongation and enhanced radial expansion (Boyer et al., 1979) and Bidens pilosa for which the response occurs at distance, hence pricking the cotyledon of a plantlet induces the growth inhibition of both the hypocotyl (Desbiez et al., 1981) and the axillary bud of the pricked cotyledon (Desbiez, 1973).
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