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盐胁迫下水稻叶片光合参数对光强的响应
引用本文:李海波,陈温福,李全英.盐胁迫下水稻叶片光合参数对光强的响应[J].应用生态学报,2006,17(9):1588-1592.
作者姓名:李海波  陈温福  李全英
作者单位:1. 沈阳农业大学农学院,沈阳,110161;中国科学院沈阳应用生态研究所,沈阳,110016;中国科学院研究生院,北京,100039
2. 沈阳农业大学农学院,沈阳,110161
3. 辽宁省农业科学院稻作研究所,沈阳,110101
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.

关 键 词:水稻  NaCl胁迫  光合生理过程  光照强度
文章编号:1001-9332(2006)09-1588-05
收稿时间:2005-09-01
修稿时间:2006-07-14

Responses of rice leaf photosynthetic parameters to light intensity under NaCl s-tress
LI Haibo,CHEN Wenfu,LI Quanying.Responses of rice leaf photosynthetic parameters to light intensity under NaCl s-tress[J].Chinese Journal of Applied Ecology,2006,17(9):1588-1592.
Authors:LI Haibo  CHEN Wenfu  LI Quanying
Institution:1. College of Agronomy, Shenyang Agricultural University, Shenyang 110161, China ; 2 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; z Graduate University of Chinese Academy of Sciences, Beijing 100039, China; 4Institute of Rice Research, Liaoning Academy of Agricuhural Science, Shenyang 110101, China
Abstract:With rice varieties salt-tolerant Liaoyan 2 and salt-sensitive Akihikari as test materials,this paper determined their leaf net photosynthetic rate (P_n),transpiration rate (T_r),stomatal conductivity (G_s),and intercel lular CO_2 concentration (C_i) at different light intensities under long-term NaCl stress. The results showed that under NaCl stress,the P_n and G_s of the two va rieties had an increase tendency with increasing light intensity,but in comparing wit h no NaCl stress,the P_n of Liaoyan 2 increased by 14.87%,while that of Akihikari decreased by 17.91%. The dynamic changes of C_i,L_s and P_n/G _s 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.
Keywords:Rice  NaCl stress  Photosynthetic physiological process  Light intensity
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