Growth and carbon balance are differently regulated by tree and shoot fruiting contexts: an integrative study on apple genotypes with contrasted bearing patterns.

摘要: In plants, carbon source–sink relationships are assumed to affect their reproductive effort. fruit trees, likely be involved in fruiting behavior. apple, a large variability behaviors exists, from regular biennial, which has been related the within-tree synchronization vs desynchronization of floral induction buds. this study, we analyzed if assimilation, availability and fluxes as well shoot growth differ apple genotypes with contrasted behaviors. Another aim was determine scale plant organization at balance regulated. The study carried out on 16 belonging three classes: (i) (ii) high production buds every year (iii) regular, displaying desynchronized bud fates each year. Three categories, vegetative shoots or without fruits, were included. This shows that differentially regulated by tree contexts. Shoot determined context, type itself, since always longer than whatever crop load. Leaf photosynthesis depended load only, irrespective category genotypic class. Starch content also strongly affected some adjustments among starch lower, least dates, fruits compared within same trees. Finally, differences terms partly matched bearing patterns. Nevertheless, role gibberellins produced seeds distances they could should further analyzed. (Resume d'auteur)