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  1. Le phenomene d'heteroblastie chez Les vegetaux: Comment l'expliquer?Cécile Lambert, Roger Buis & Marie-Thérèse L'Hardy-Halos - 1995 - Acta Biotheoretica 43 (1-2):67-80.
    Heteroblastic development is often observed in Cormophytae, but it can also be characterized in Thallophytae as shown by the detailed investigation of the development of the algaAntithamnion plumula (Ceramiaceae, Rhodophyta). In this species, heteroblasty concerns (i) dimensional variables (such as pleuridia length and lateral cladome first tagma length) and (ii) variables that characterize the cell growth kinetics (main axis cells). Apex curvature also varies during ontogenesis.The generality of the property in plants led to search for its origin: apical meristem own (...)
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  • Caracterisation de la structure d'un processus de croissanceCharacterization of the structure of a growth process.Roger Buis, Marie-Thérèse L'Hardy-Halos & Cécile Lambert - 1996 - Acta Biotheoretica 44 (3):359-375.
    L'analyse d'une cinétique de croissance y est conduite à partir du modèle logistique généralisé de Richards-Nelder. On distingue 2 types de processus dits mono- et multi-logistique. Dans le cas mono-logistique, le phénomène est correctement décrit par une seule fonction logistique. La cinétique de croissance est alors caractérisée par lea propriétés de chacune des phases G 1 à G 4, délimitées par les points singuliers Γmax, V max et Γmin. On appelle structure de croissance la contribution relative de ces différentes phases (...)
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  • Foreword.Roger Buis & Christian Brière - 1995 - Acta Biotheoretica 43 (1-2):1-1.
    The growth of the vein system of the leaf ofTropaeolum peltophorum was studied at the vein level and at the limb level.The vein growth kinetics depend on the position of the vein on the leaf: there is a proximal/distal gradient and a bilateral gradient of the growth parameters. The growth field of the veins is also dependent on time and on vein position.Specific correspondences exist between singular points of the global growth curves, the variations of the growth field and the (...)
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