内源激素与多小穗小麦幼穗分化持续时间的关系  

The Influence of Phytohormone on the Duration of Spike Differentiation in Multispiklet Wheat

作　　者：魏育明[1] 郑有良[1] 

机构地区：[1]四川农业大学小麦研究所,四川都江堰611830

出　　处：《麦类作物学报》2000年第2期35-38,共4页Journal of Triticeae Crops

基　　金：四川省教委和四川省科委资助项目

摘　　要：以多小穗小麦品系 1 0 -A及其改良系为供试材料 ,在小麦幼穗分化发育过程中 ,研究了吲哚乙酸( IAA)、玉米素 ( ZT)、赤霉酸 ( GA3)和脱落酸 ( ABA)等 4种内源激素与小麦幼穗分化持续期和小穗数间的关系。结果表明 ,小穗数与单棱分化和二棱分化持续期具有显著的正相关关系 ( r值分别为 0 .76和 0 .88)。相对较高水平的 ZT含量、ZT/IAA值、ZT/ABA值和 GA3/IAA值具有延长小麦幼穗分化持续期的作用 ;而相对较高水平的 IAA和 ABA含量以及 ZT/GA3则具有缩短幼穗分化持续期的作用。这些结果说明 ,内源激素可能是通过调控小麦单棱分化和二棱分化持续时间长短来影响其小穗数的。During different stages of spike differentiation the content of endogenous IAA, ZT, GA 3 and ABA in young shoots of multispikelet wheat line 10 A and its recombinants have been investigated. The correlation between phytohormone and duration of spike differentiation has been analyzed. The results showed that spikelet number was significantly and positively correlated to the length of the period of single ridge and double ridge differentiation. Higher ZT, ZT/IAA, ZT/ABA and GA 3/IAA values had the effects of lengthening the period of spike differentiation, but higher IAA, ABA and ZT/GA 3 values had the effects of shortening the period of spike differentiation. These results suggested that phytohormone influenced the spikelet number indirectly through lengthening or shortening the period of spike differentiation.

关 键 词：小麦 幼穗分化 内源激素 多小穗品系 持续期 

分 类 号：S512.101[农业科学—作物学] S312