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盐胁迫下水稻叶片光合参数对光强的响应

李海波1,2,3;温福1;全英4   

  1. 1沈阳农业大学农学院,沈阳 110161;2中国科学院沈阳应用生态研究所,沈阳 10016;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, 沈阳 110101
  • 收稿日期:2005-09-01 修回日期:2006-07-14 出版日期:2006-09-18 发布日期:2006-09-18

Responses of rice leaf photosynthetic parameters to light intensity under NaCl s-tress

LI Haibo1,2,3;HEN Wenfu1;LI Quanying4   

  1. 1College of Agronomy,Shenyang Agricultural University,Shenyang 110161,China; 2Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 3Graduate University of Chinese Academy of Sciences, Beijing 100039, China;4Institute of Rice Research, Liaoning Academy of Agricultural Science, Shenyang 110101, China

  • Received:2005-09-01 Revised:2006-07-14 Online:2006-09-18 Published:2006-09-18

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: 景观生态学, 景观结构, 绿地, 空间布局

Abstract: With rice varieties salt-tolerant Liaoyan 2 and salt-sensitive Akihikari as test materials, this paper determined their leaf net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductivity (Gs), and intercellular CO2 concentr-ation (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 NaCl stress, the Pn 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.

Key words: Landscape ecology, Landscape structure, Greenland, Spatial pattern