干旱地区农业研究2017，Vol.35Issue(3)：126-129,277,5.DOI:10.7606/j.issn.1000-7601.2017.03.20
短时水分胁迫对水稻叶片光合作用的影响
The effects of short-term water stress on leaf photosynthesis in rice
摘要
Abstract
In order to reveal the physiological mechanism of the reduction of photosynthesis under water stress,the change of photosynthetic and chlorophyll fluorescence characteristics and key enzymes activities of photosynthetic apparatus after 150 rmin 30％ PEG-6000 stress were investigated using rice seedling under hydroponic culture.The result indicated that stomatal conductance decreased drastically,while intercellular CO2 concentration,net photosynthetic rate,transpiration rate,and chlorophyll fluorescence parameters decreased gradually by 0 ～ 60 min of stress.During 60 ～ 120 min of stress,stomatal conductance decreased slowly,RuBP carboxylase activity began to rapidly decreased,intercellular CO2 concentration began to rise,non-photochemical quenching continued rise,other photosynthetic fluorescence parame ters continued to drop.After 120 min of stress,non-photochemical quenching began to decline,RuBP carboxylase activity and intercellular CO2 concentration showed a trend of declining and increasing respectively,while other photosynthetic fluorescence parameters declined.These results suggest that photosynthesis during 0 ～ 60 min of stress and 60 ～ 120 min of stress,and after 120 min of stress were regulated by stomatal limitation,combination of stomatal limitation and nonstomatal limitation,and non-stomatal limitation,respectively.关键词
水稻/短时水分胁迫/光合荧光特性/非气孔限制/气孔限制Key words
rice/short-term water stress/photosynthetic and chlorophyll fluorescence characteristics/non-stomatal limitation/stomatal limitation分类
农业科技引用本文复制引用
李俊周,乔江方,李梦琪,杜彦修,赵全志..短时水分胁迫对水稻叶片光合作用的影响[J].干旱地区农业研究,2017,35(3):126-129,277,5.基金项目
河南省重大科技专项(141100110600) （141100110600）
河南省高校科技创新人才支持项目(16HASTIT016) （16HASTIT016）
郑州市节水农业重点实验室建设项目(112PYFZX185) （112PYFZX185）
