低温下外源水杨酸对水稻幼苗光合作用的影响  

Effects of Salicylic Acid on Photosynthesis of Rice Seedlings under Chilling Stress

作　　者：张蕊[1] 龚守富[2] 李可凡[1] 王三根[3] 吕俊[3] 

机构地区：[1]周口职业技术学院生物工程系,河南周口466000 [2]信阳农业高等专科学校规划与设计系,河南信阳464000 [3]西南大学农学与生物科技学院,重庆400716

出　　处：《湖北农业科学》2012年第5期883-886,共4页Hubei Agricultural Sciences

基　　金：重庆市自然科学基金重点项目(2009BA1006);重庆市水稻玉米良种创新重大专项(CSTC;2007AB1033;2007AA1019)

摘　　要：以水稻(Oryza sativa L.)品种西农优1号为材料,用0.5 mmol/L外源水杨酸(SA)对水稻幼苗进行叶面喷施和灌根预处理。结果表明,用0.5 mmol/L SA预处理使水稻幼苗叶片在低温胁迫下总叶绿素含量增加,气孔导度及胞间CO2含量下降,净光合速率增加,电解质渗漏率和丙二醛(MDA)含量降低。说明SA可能为低温胁迫下水稻幼苗的光合器官提供保护作用,从而减轻低温胁迫对水稻幼苗的伤害,提高水稻幼苗的抗寒性。The effect of salicylic acid （SA） pretreatment on photosynthesis of ＂Xinongyou 1＂ rice seedlings under chilling stress was investigated. The results showed that 0.5 mmol/L SA pretreatment increased the chlorophyll content, and net photo- synthetic rate, while decreased stomatal conductivity, intercellular content, electrolytes leakage and malondialdehyde（MDA）. It was indicated that SA pretreatment could increase chilling resistance of rice seedling by protecting photosynthetic organization.

关 键 词：水稻(Oryza SATIVA L.) 幼苗 低温 外源水杨酸(SA) 光合作用 

分 类 号：S511[农业科学—作物学] Q946.885[生物学—植物学]