摘要
NAA和GA3 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CP PU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
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 with those of pollination in Lagenaria leucantha. Parthenocarpic fruits formed by CPPU induction were significantly larger than pollinated fruits. NAA and GA 3 increased fruit set, but neither of them could induce the formation of parthenocarpic fruits of normal size(Fig.1 and Table 1). CPPU stimulated both 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 with unpollinatecd ovaries and pollinated fruits(Table 1 and Figs.2,3).IAA (indoleacetic acid) and t zeatin concentrations, however, were lower in CPPU treated fruit than in pollinated and unpollinated fruits(Table 2).
基金
国家自然科学基金重点资助项目 (3 983 0 2 3 0 )
国家优秀留学归国人员基金资助项目
关键词
CPPU
瓠瓜
单性结实
虚果率
果实发育
内源激素
细胞分裂
诱导作用
CPPU, Lagenaria leucantha , parthenocarpy, fruit set, fruit development, endogenous hormones, cell division
