山西农业大学学报（自然科学版）2017，Vol.37Issue(6)：396-401,6.
干旱对谷子灌浆期光合生理及生长发育的影响
Effects of drought on photosynthetic physiology and growth of millet during grain filling
摘要
Abstract
[Objective]Studying on the influence of drought on millet and understanding the physiological mechanism of drought,will provide the basis of millet production in arid area.[Method]The effects of drought on photosynthetic physiology and growth of millet were studied by pot water control experiment.[Results]The results showed that drought decreased the net photosynthesis rate,stomatal conductance,intercellularCO2 concentration and transpiration rate in millet by 70.50%,79.67%,49.04% and 74.62% at grain filling stage,respectively.But the water use efficiency was increased by 50.66%.Chlorophyll a,chlorophyll b,chlorophyll a+b and carotenoid content were decreased by 39.53%,58.67%,46.49% and 21.42%,respectively.Reducing sugar and soluble sugar contents were increased by 60.13% and 64.68%,respectively.The total biomass,yield,plant height,stem diameter,node number,spike weight,grain weight were significantly decreased,but panicle length was not affected.[Conclusion]The drought reduced the photosynthesis capacity,leading to a decreased yield of millet.To keep the normal physiological function under drought,millet reduced the water loss and adjusted osmotic pressure by decreasing stomatal conductance andincreasing the soluble sugar content in leaves.关键词
谷子/干旱/光合作用/生长/产量Key words
Millet/Drought/Photosynthesis/Growth/Yield分类
农业科技引用本文复制引用
袁蕊,郝兴宇,胡晓雪,宗毓铮,李萍..干旱对谷子灌浆期光合生理及生长发育的影响[J].山西农业大学学报（自然科学版）,2017,37(6):396-401,6.基金项目
国家973计划课题(2012CB955904) （2012CB955904）
国家科技支撑计划(2013BAD11B03-8) （2013BAD11B03-8）
山西省科技攻关计划项目(20150311006-2) （20150311006-2）
国家自然科学基金项目(31601212、31501276) （31601212、31501276）
山西农业大学博士引进人才项目(2013YT05) （2013YT05）
