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盐胁迫下钙对水稻幼苗光合作用及相关生理特性的影响
引用本文:朱晓军,杨劲松,梁永超,娄运生,杨晓英.盐胁迫下钙对水稻幼苗光合作用及相关生理特性的影响[J].中国农业科学,2004,37(10):1497-1503.
作者姓名:朱晓军  杨劲松  梁永超  娄运生  杨晓英
作者单位:1. 中国科学院南京土壤研究所,南京,210008;南京农业大学资源与环境科学学院,南京,210095
2. 中国科学院南京土壤研究所,南京,210008
3. 南京农业大学资源与环境科学学院,南京,210095;中国农业科学院土壤肥料研究所,北京,100081
4. 南京农业大学资源与环境科学学院,南京,210095
基金项目:国家重点基础研究发展规划资助项目(G1999011803)
摘    要: 研究了外源Ca2+对盐胁迫下耐盐性不同的2个水稻品种(武育粳3号和IR36)光合作用和相关生理指标的影响。结果表明,外源Ca2+能有效改善水稻的光合作用,其净光合速率(Pn)、气孔导度(Gs)均较盐胁迫条件下未加Ca2+处理有明显的增加。细胞间隙CO2浓度(Ci)、气孔限制值(Ls)的升降速度也是加Ca2+的处理比未加Ca2+的处理快。外源Ca2+能提高水稻叶片叶绿素的含量,增加脯氨酸和可溶性糖的积累。此外,外源Ca2+还降低了丙二醛含量和细胞膜透性,并有效增强SOD酶的活性。

关 键 词:  盐胁迫  光合作用  水稻
收稿时间:2004-2-17

Effects of Exogenous Calcium on Photosynthesis and Its Related Physiological Characteristics of Rice Seedlings Under Salt Stress
ZHU Xiao-jun,YANG Jin-song,LIANG Yong-chao,LOU Yun-sheng,YANG Xiao-ying.Effects of Exogenous Calcium on Photosynthesis and Its Related Physiological Characteristics of Rice Seedlings Under Salt Stress[J].Scientia Agricultura Sinica,2004,37(10):1497-1503.
Authors:ZHU Xiao-jun  YANG Jin-song  LIANG Yong-chao  LOU Yun-sheng  YANG Xiao-ying
Institution:ZHU Xiao-jun1,YANG Jin-song1,LIANG Yong-chao2,LOU Yun-sheng2,YANG Xiao-ying1 2 3
Abstract:Two rice (Oryza sativa L.) cultivars, Wuyujing No.3 (salt-tolerant) and IR36 (salt-sensitive), were used to investigate the effects of exogenous calcium on some photosynthetic and physiological characteristics of the leaves of rice grown under salt stress. The results showed that the photosynthesis and photosynthetic efficiency of the leaves of salt-stressed rice were significantly enhanced with the inclusion of Ca2 . The levels of net photosynthetic rate and stomatal conductance increased more significantly than the control without Ca2 , and the rate of increase or decrease of intercellular CO2 concentration and stomatal limitation value were faster than that of the controlwithout Ca2 too. Addition of Ca2 increased the contents of chlorophyll, proline and soluble sugar of the leaves of rice under salt stress. Furthermore, addition of Ca2 reduced the content of MDA and the permeability of cell membrane, but increased the SOD activity.
Keywords:Calcium  Salt stress  Photosynthesis  Rice
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