干旱胁迫对谷子孕穗期光合特性的影响  

Effects of Drought Stress on Millet Photosynthetic Characteristics in Booting Stage

作　　者：张文英[1] 智慧[2] 柳斌辉[1] 李明哲[1] 李伟[1] 谢俊雪[1] 宋庆荣[1] 刁现民[2] 

机构地区：[1]河北省农林科学院旱作农业研究所,河北衡水053000 [2]中国农业科学院作物科学研究所,北京100081

出　　处：《河北农业科学》2011年第6期7-11,共5页Journal of Hebei Agricultural Sciences

基　　金：国家自然科学基金项目(30630045);国家863课题(2006AA10Z157);国家863课题(200810Z158);国家科技部支撑计划项目(2007BAD69B01);国家科技部支撑计划项目(2006BAD02B02);国家谷子现代农业产业技术体系项目

摘　　要：为探索谷子孕穗期在干旱环境的光合适应机制,筛选谷子孕穗期抗旱性光合参数鉴定指标,以20个谷子品种为试验材料,在模拟干旱棚中研究了谷子孕穗期干旱胁迫条件下光合参数指标的的变化。结果表明:干旱胁迫处理的相对叶绿素含量和相对光合速率与品种的抗旱指数呈极显著正相关,且灰色关联度较高,可作为评价谷子孕穗期抗旱性的光合参数指标。Foxtail millet may suffer from serious drought stress during their growth period, which affects their photosynthesis activities. Previous studies identified that booting stage before heading is the most sensitive period to water shortage in the development of foxtail millet. In this trial, 20 foxtail millet cuhivars＇ photosynthetic characteristics correlated with drought resistance index （Dill） were monitored under both normal and drought stress conditions during booting stage. Resuhs showed that relative chlorophyll content significantly correlated with DRI under drought conditions, drought resistance abilities. and photosynthetic rate were significantly or very could be used as the photosynthetic index to plant＇s

关 键 词：干旱胁迫 谷子 孕穗期 光合特性 

分 类 号：S515[农业科学—作物学]