作物学报2017，Vol.43Issue(11)：1603-1610,8.DOI:10.3724/SP.J.1006.2017.01603
丙环唑对玉米幼苗生长的调控及其相关机制
Growth Regulation and the Mechanism of Propiconazole in Maize Seedlings
摘要
Abstract
Propiconazole (Pcz) has been widely used as fungistat in crop production. Meanwhile, Pcz can be used as plant growth regulator to influence plant growth. There is less study on the application of Pcz in maize. The present experiment using maize variety Zhengdan 958 was conducted to study the effect of Pcz on maize seedling growth, cell morphology and hormone signal. Pcz treatment inhibited the growth of mesocotyl and coleoptile, reduced plant height, shortened the length of sheath and leaf, and decreased leaf angle significantly. At the same time, longitudinal growth of sheath and leaf was inhibited and the shape of pulvinus cells changed from loosened rectangle type or oval type to closely spaced spindle cell. Furthermore, the GA (GA1and GA3)content was reduced significantly and the expression of GA biosynthesis gene GA3ox1 was down-regulated,the expression of GA2ox5 and GA2ox8, genes involved in GA inactivation, was up-regulated, and the expression of GA biosynthesis gene GA20ox1 was up-regulated at the beginning and down-regulated later;the BR content was reduced significantly and the expres-sion of BR biosynthesis genes CPD and DWF4 was up-regulated,which might be feedback regulated by endogenous BR levels. In addition, the expression of expansin genes EXPA4, EXPA5 and xyloglucan endotransglucosylase/hydrolase genes XTH1 and XET1 was down-regulated.In conclusion,Pcz treatment can adjust the signal transduction of GA and BR,inhibit the accumulation of GA and BR,regulate the expression of EXPs and XTHs,control the cell growth,and adjust plant type of maize effectively.关键词
玉米/丙环唑/油菜素内酯/株型/细胞形态Key words
Maize/Propiconazole/Brassinosteroids/Phenotype/Cellular morphology引用本文复制引用
郝岭,邢嘉鹏,段留生,张明才,李召虎..丙环唑对玉米幼苗生长的调控及其相关机制[J].作物学报,2017,43(11):1603-1610,8.基金项目
本研究由引进国际先进农业科学技术计划(948计划)项目(2011-G19)资助.This study was supported by the Introduction of International Advanced Agricultural Science and Technology Program (948 Program, 2011-G19). （948计划）
