摘要
在不同群体条件下 ,测定小麦幼穗发育过程中生长素 (IAA)、赤霉素 (GA3)、玉米素核苷 (ZR)、异戊烯基腺苷(i PA)和脱落酸 (ABA)含量的变化动态 ,分析小麦幼穗内源激素含量与小花发育的关系。结果表明 :单棱期幼穗中较高含量的 GA3有利于小穗的分化 ;雌雄蕊原基分化期幼穗中高含量的 ZR和 i PA,小花分化数多 ,较高含量的 ZR和 i PA有利于小花分化。而孕穗期高含量的 ABA,可孕小花数少 ,ZR/IAA、i PA/ABA比值与可孕小花数相关密切 ,较低含量的IAA。
The changes of contents of indole 3 acetic acid (IAA), gibberellin (GA 3), zeatin nucleotide (ZR), isopentenyl adenine (iPA) and abscisic acid (ABA) in young spikes of wheat were investigated, and the relation of endogenous hormone contents in young spikes to floret development was analysed. The results showed that relatively high GA 3 content in young spikes at single ridge stage was beneficial to the differentiation of spikelets. High contents of iPA and ZR at the pistil and stamen primordium differentiation stage could promote the formation of fertile florets per spike. Relatively low contents of IAA and ABA at booting stage improved floret fertility.
基金
江苏省应用基础研究项目 (DJ970 77)
江苏省农业三项工程项目
关键词
小麦
幼穗
小花发育
内源激素含量
wheat
young spike
floret development
endogenous hormones content
