A model for an early stage of tomato fruit development:: Cell multiplication and cessation of the cell proliferative activity

被引:30
作者
Bertin, N
Génard, M
Fishman, S
机构
[1] INRA, Unite Plantes & Syst Culture Hort, F-84914 Avignon 9, France
[2] Agr Res Org, Volcani Ctr, Dept Stat & Operat Res, IL-50250 Bet Dagan, Israel
关键词
cell division; fruit growth; Lycopersicon esculentum; mitosis cessation; model; telomere; tomato;
D O I
10.1093/aob/mcg111
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Changes in cell number during the early period of tomato fruit development were analysed by means of a deterministic model of cell multiplication. The period commenced at the seed stage with one theoretical cell undergoing intensive cell division, and ended when the cell number became nearly constant. The model takes into consideration the proliferative activity of the fruit cell population which, a few days before flower anthesis, begins to decrease progressively after each mitotic cycle. Model parameters, namely the time at which proliferative activity diminishes, its rate of decrease and the length of the cell cycle, were estimated by fitting the model to observed cell population dynamics in tomato fruits growing in three different positions on the truss. It is hypothesized that the molecular mechanism responsible for the cessation of mitosis in growing fruits is associated with shortening of telomeric ends of nuclear DNA, as suggested previously for other growing cell populations. (C) 2003 Annals of Botany Company.
引用
收藏
页码:65 / 72
页数:8
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