外源山梨醇对盐胁迫下两优培九和武运粳7号光合特性及类囊体膜多肽组分的影响  

Effect of Exogenous Sorbitol on Photosynthetic Characteristics and Polypeptide Compositions of Thylakoid Membrane of Liangyoupeijiu and Wuyunjing 7 under Salt Stress

作　　者：杨艳华[1] 陈国祥[1] 刘少华[1] 周泉澄[1] 陈利[1] 王贵民[1] 吕川根[2] 

机构地区：[1]南京师范大学生命科学学院 [2]江苏省农业科学院粮食作物研究所,江苏南京210014

出　　处：《中国水稻科学》2004年第3期234-238,共5页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目 (3 0 2 7792 );江苏省高校自然科学研究计划项目 (0 2KJB180 0 6)

摘　　要：以 4叶期的水稻幼苗为材料 ,比较研究了外源山梨醇处理对盐胁迫下两优培九和武运粳 7号幼苗光合特性及类囊体膜多肽组分的影响。研究结果表明 ,随着盐处理浓度的增加 ,两优培九和武运粳 7号的叶绿素含量、PSⅡ的电子传递活性、叶绿体放氧活性、光合速率呈下降趋势 ;叶绿体ATP含量、叶绿体ATP酶 (Mg2 + ATP酶和Ca2 + ATP酶 )活性先升后降 ,PSⅠ的电子传递活性、呼吸速率则呈上升的趋势 ;但类囊体膜的多肽组分并不存在明显的差异。相比之下 ,两优培九对盐胁迫的抗性大于武运粳 7号 ,具有一定的高产优势。外源山梨醇对两种水稻抵抗盐胁迫具有一定的缓解作用。Photosynthetic characteristics and polypeptide compositions of thylakoid membrane in four-leaf-stage rice seedlings of Liangyoupeijiu and Wuyunjing 7 under salt stress were studied when rice plants were sprayed with sorbitol. With increase of salt concentration, chlorophyll content, electron transport activity of PSⅡ, the O 2 evolution of chloroplast and photosynthetic rate decreased, the ATP content in chloroplast, ATPase activity of chloroplast first boosted up and then dropped, but electron transport activity of PSⅠ, respiration rate enhanced. There were not obvious differences on the polypeptide compositions of thylakoid membrane. The resistance to salt stress in Liangyoupeijiu is obviously stronger than that in Wuyunjing 7. Exogenous sorbitol has some mitigative functions to salt stress.

关 键 词：山梨醇 盐胁迫 两优培九 武运粳7号 光合特性 水稻 品种 

分 类 号：S511.2[农业科学—作物学]