盐胁迫下水稻叶片光合参数对光强的响应

被引:42
作者
李海波 [1 ]
陈温福 [1 ]
李全英 [2 ]
机构
[1] 沈阳农业大学农学院
[2] 辽宁省农业科学院稻作研究所
关键词
水稻; NaCl胁迫; 光合生理过程; 光照强度;
D O I
10.13287/j.1001-9332.2006.0315
中图分类号
S511 [稻];
学科分类号
0901 ;
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.
引用
收藏
页码:1588 / 1592
页数:5
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