盐胁迫下水稻叶片光合参数对光强的响应  

Responses of rice leaf photosynthetic parameters to light intensity under NaCl stress.

作　　者：李海波[1,2,3] 陈温福[1] 李全英[4] 

机构地区：[1]沈阳农业大学农学院 [2]中国科学院沈阳应用生态研究所,沈阳110016 [3]中国科学院研究生院,北京100039 [4]辽宁省农业科学院稻作研究所

出　　处：《应用生态学报》2006年第9期1588-1592,共5页Chinese Journal of Applied Ecology

基　　金：辽宁省自然科学基金资助项目(2001101011).

摘　　要：以耐盐性不同的两个水稻品种秋光和辽盐2号为试材,在设定条件下测定长时间NaCl胁迫下水稻剑叶的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)和胞间CO2浓度(Ci)在不同光照强度(PFD)诱导下的反应差异与水稻抗性的关系.结果表明,在不同浓度NaCl胁迫下,随着PFD的升高,两品种的Pn和Gs均呈上升趋势,与对照相比,耐盐品种辽盐2号的Pn增加了14.87%,而秋光的Pn则下降了17.91%.Ci、Ls及Pn/Gs比值的变化趋势表明,气孔因素和非气孔因素对辽盐2号的光合变化起到了积极作用,而气孔因素则是引起秋光光合变化的主要原因.With rice varieties salt-tolerant Liaoyan 2 and salt-sensitive Akihikari as test materials, this paper determined their leaf net photosynthetic rate （ Pa ）, transpiration rate （ Tr ）, stomatal conductivity （ Gs ）, and intercellular CO2 concentration （Ci ） at different light intensities under long-term NaCl stress. The results showed that under NaCl stress, the Pn and Gs of the two varieties had an increase tendency with increasing light intensity, but in comparing with no NaC1 stress, the P, of Liaoyan 2 increased by 14. 87%, while that of Akihikari decreased by 17.91%. The dynamic changes of Ci, Ls and Pn/Gs indicated that stomatal and non-stamatal factors played a positive role in the changes of Liaoyan 2 photosynthesis, while stomatal factor was the main reason inducing the changes of Akihikari photosynthesis.

关 键 词：水稻 NACL胁迫 光合生理过程 光照强度 

分 类 号：S511[农业科学—作物学]