Predicting the environmental thresholds for cambial and secondary vascular tissue development in stems of hybrid aspen

作者: Peter W. Barlow , Stephen J. Powers

DOI: 10.1051/FOREST:2005049

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摘要: Les interactions entre conditions environnementales et developpement des tissus vasculaires secondaires ont ete etudiees au cours du de jeunes pousses tremble hybride (Populus tremula x P. tremuloides) a l'aide d'un modele regression associe equations differentielles. Deux series donnees combinees. La premiere concernait le nombre cellules accumulees differents types - fibres xylemiennes, vaisseaux, phloeme, rayons parenchymateux dans les files radiales tiges echantillonnees intervalles temps reguliers sur une periode 16 mois. Etaient aussi pris en compte cambiales fusiformes perimetre cambial (cellules initiales). seconde serie variables externes, dont valeurs relevees rapproches, tout long la d'echantillonnage pousses. environneinentales prises sont temperature l'eclairement, donnee partir laquelle est estimee duree jour. Elles utilisees pour definir unites « », desquelles se font regressions contre secondaires. analyses permettent d'estimer non seulement taux production cellules, mais seuils parametres environnementaux dessus dessous productions cellulaires inities ou arretes fonction saisonnieres. De cette maniere on pu identifier critiques chacun ces cellules.

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