结实期高温胁迫对糯玉米子粒发育和内源激素含量的影响  

Effects of High Temperature after Pollination on Grain Development and Endogenous Hormone Contents of Waxy Maize

作　　者：杨欢 沈鑫 丁梦秋 陆大雷 陆卫平 

机构地区：[1]扬州大学/江苏省作物遗传生理国家重点实验室培育点,粮食作物现代产业技术协同创新中心,江苏扬州225009

出　　处：《玉米科学》2017年第2期55-60,67,共7页Journal of Maize Sciences

基　　金：国家自然科学基金项目(31271640,31471436);江苏省高校自然科学研究重大项目(14KJA210004);江苏省青蓝工程项目;江苏高校优势学科建设工程

摘　　要：利用人工智能温室研究结实期高温胁迫(35℃)对糯玉米子粒发育和内源激素含量的影响。结果表明,结实期高温胁迫降低子粒鲜重和干重,高温胁迫下较低的含水率表明子粒灌浆进程加快。高温胁迫加快果皮中淀粉体的降解速度,胚乳细胞中淀粉体充实提前,淀粉积累加速,但持续积累时间缩短,成熟期淀粉含量低于常温处理。与常温相比,高温胁迫增加子粒中ABA和GA_3含量,IAA、CTK和Z含量前期增加,后期降低。内源激素含量的变化可部分解释高温胁迫下淀粉积累提前但持续时间缩短的原因。The effects of heat stress after pollination on grain development and endogenous hormone content ofwaxy maize were studied in the intelligent greenhouse. The results indicated that heat stress decreased grain dry andfresh weight, and lower water content in grains indicated that the grain filling rate was accelerated. The degradationrate of amyloplast in pericarp was accelerated by heat stress, the filling of amyloplast in endosperm was advancedand the accumulation rate of starch was accelerated, while the time of duration was shortened, and the starch contentat maturity under heat stress was lower than its counterpart under ambient environment. Compared with plant grow-ing under ambient temperature, heat stress increased the ABA and GA_3 content, while IAA, CTK and Z content ingrain was increased earlier and decreased later, respectively. In conclusion, the change of those endogenous hor-mone content in grain maybe partially interpreted the starch accumulation aheaded and duration shortened underheat stress during grain filling.

关 键 词：糯玉米 高温胁迫 内源激素含量 子粒灌浆 淀粉积累 形态结构 

分 类 号：S513.01[农业科学—作物学]