华北农学报2017，Vol.32Issue(3)：118-124,7.DOI:10.7668/hbnxb.2017.03.018
干旱胁迫下外源油菜素内酯对玉米幼苗光合作用和D1蛋白的调控效应
Exogenous BR Alleviates Drought Stress by Regulating Photosynthesis and D1 Protein in Maize Seedlings
摘要
Abstract
In order to reveal the protective mechanism of exogenous Brassinolide on the photosynthesis of maize seedlings under drought stress,this experiment used the Zhuyu 309 as test materials and adopted the solution culture method,studying the changes of growth parameters,chlorophyll content,photosynthetic parameters,chlorophyll fluorescence parameters and D1 protein content of maize seedlings that used 20% PEG-6000 to simulate drought stress after exogenous Brassinolide (BR) pretreatment.Compared with that of drought stress,the results of corn seedling which after the BR pretreatment showed that its height increased by 45.87%,the root length increased by 20.56%,the total dry matter accumulation increased by 8.01%,the relative water content increased by 4.50%,chlorophyll a content increased by 26.32%,and photosynthetic parameters (Pn,Gs,Ci,Tr) increased by 9.57%,38.23%,30.19% and 28.12% respectively,the activity of photosynthetic system Ⅱ (ΦPSⅡ) increased by 20.48%,and the maximum photochemical efficiency increased by 0.66%.Photosynthetic system Ⅱ absolute electron transport rate (ETR (Ⅱ) and the relative electron transport rate of photosynthetic system Ⅱ(rETR(Ⅱ)) were increased by 20.40% and 31.02% respectively.The content of D1 protein increased by 37.34% (P<0.05).The results showed that BR treatment under drought stress condition could improve the growth and development of maize seedlings,alleviate the damage of photosynthesis system,promote the stability of D1 protein and improve the adaptability of maize seedling to drought stress.关键词
玉米幼苗/干旱胁迫/外源油菜素内脂/光合作用/D1蛋白/调控效应Key words
Maize seedlings/Drought stress/Exogenous BR/Photosynthesis/D1 protein/Regulatory effect分类
农业科技引用本文复制引用
马野,原换换,裴新涌,冉午玲,樊晓聪,郑博元,毛俊,杨青华,邵瑞鑫..干旱胁迫下外源油菜素内酯对玉米幼苗光合作用和D1蛋白的调控效应[J].华北农学报,2017,32(3):118-124,7.基金项目
河南省科技创新人才计划支持项目(114100510019) （114100510019）
