林业科学2012，Vol.48Issue(7)：61-65,5.
1年生泡桐不同部位顶芽内源激素的动态变化
Dynamic Changes of Endogenous Hormones in Terminal Buds from Different Crown Position of One-Year-Old Paulownia
摘要
Abstract
In order to probe the relationship between terminal bud death and endogenous hormones in Paulownia, ELISA was adopted to measure the content changes of endogenous hormones in the terminal buds from top shoots, the upper lateral branches, the middle lateral branches and the lower lateral branches of one-year-old P. tamentosa×P. fortunei '33'. The results are as follows: 1 ) IAA in all different terminal buds had similar change trend of "drop-rise-drop" , with only except for what IAA in terminal bud from upper lateral branch delayed to decline after reaching its peak; 2 ) The change of CA, content of terminal buds from top shoots, the upper lateral branches and the lower lateral branches showed a basically same trend, namely, "rise-drop-rise-drop" with two peaks; but GA3 content from the middle lateral branches presented a " drop-rise-drop"; 3) The changes of ABA content from all different terminal buds elevated at first, then reduced and finally stabilized in the low level; 4 ) The changes of ZR content from different terminal buds showed different trends, with an overall downward trend. There existed competition relations and inhibition among terminal buds from different branches positions; 5) From Aug-15 to Sept-15, IAA,GA3 ,ZR,ABA and (IAA + GA3 +ZR)/ABA presented a downward trend, which indicated that the hormones of growth promotion and dormancy induction were lower. The terminal bud had no competitive advantage compared with other adjacent tissue, and the dynamic balance of endogenous hormones was broken. This study illustrated a clear relationship between terminal bud death and endogenous hormones in Paulownia, and laid a foundation for further study of the terminal bud death mechanism in Paulownia.关键词
泡桐/内源激素/酶联免疫/顶芽死亡Key words
Paulownia/ endogenous hormones/ ELISA/ terminal bud death分类
农业科技引用本文复制引用
王艳梅,刘震,牛晓锋..1年生泡桐不同部位顶芽内源激素的动态变化[J].林业科学,2012,48(7):61-65,5.基金项目
河南省教育厅自然科学研究计划项目(2010A220001) （2010A220001）
河南省基础与前沿技术研究计划项目(112300410087). （112300410087）
