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CPPU对瓠瓜单性结实的诱导作用及对细胞分裂和内源激素水平的影响

李英, 喻景权, 朱祝军, 陈暄, 胡文海

浙江大学园艺系.浙江,杭州 310029；浙江大学茶学系.浙江,杭州 310029

摘要

NAA和GA_(3)处理未经授粉的瓠瓜子房不能显著促进其细胞分裂和膨大而产生单性结实果,而CPPU处理未经授粉的瓠瓜子房则使其细胞数目和中果皮单个细胞横切面积以及单果重都显著高于未授粉和人工授粉果。经CPPU诱导座果而产生的单性结实果中IAA、ABA和t-zeatin的浓度均不同程度地低于人工授粉和不授粉果实。

关键词： CPPU; 瓠瓜; 单性结实; 座果率; 果实发育; 内源激素; 细胞分裂

Fruit growth, cell division and endogenous hormones level in parthenocarpic fruit formed by CPPU induction in Lagenaria leucantha

Li Ying, Yu Jingquan, Zhu Zhujun, Chen Xuan, Hu Wenhai

Department of Horticulture,Zhejiang University.Hangzhou 310029,Zhejiang；China

Abstract

The effects of NAA (naphthaleneacetic acid), GA_(3) (gibberellic acid) and CPPU (N-(2-chloo-4-phidyl)-N^-phenylurea) on fruit set and development, cell division and expansion, and the level of endogenous hormones of fruits developed from unpollinated flowers were studied and compared wit those of pollination in Lagenaria leucantha. Parthenocarpic fruits formed by CPPU induction were significantly larger than polinated fruits. NAA and GA_(3) increased fruit set, but neither of them could induce the formation of parthenocarpic fruits of normal size. CPPU stimulated bot cell division and expansion. Cell number in longitudinal section, cell area in inner pericarp in cross-section and fruit weight are significantly larger in pathenocarpic fruit formed by CPPU induction, as compared wit unpollinatecd ovaries and pollinated fruits. IAA (indoleacetic acid) and t-zeatin concentrations, however, were lower in CPPU-treated fruit than in pollinated and unpollinated fruits.

Key words: CPPU;Lagenaria leucantha;Parthenocarpy;Fruit set;Fruit development;Endogenous hormones;Cell divi-sion

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引用本文：

李英, 喻景权, 朱祝军, 陈暄, 胡文海. CPPU对瓠瓜单性结实的诱导作用及对细胞分裂和内源激素水平的影响[J]. 生理学报 2001; 53 (2): .

Li Ying, Yu Jingquan, Zhu Zhujun, Chen Xuan, Hu Wenhai. Fruit growth, cell division and endogenous hormones level in parthenocarpic fruit formed by CPPU induction in Lagenaria leucantha. Acta Physiol Sin 2001; 53 (2): (in Chinese with English abstract).