盐胁迫抑制枸杞光合作用的可能机理

生态学杂志 ›› 2004, Vol. ›› Issue (1): 5-9.

盐胁迫抑制枸杞光合作用的可能机理

惠红霞¹, 许兴¹, 李守明²

1. 宁夏农业生物技术重点实验室, 银川, 750002;
2. 宁夏农学院, 永宁, 750105

收稿日期:2002-06-19 修回日期:2002-07-10 出版日期:2004-02-10
通讯作者: 惠红霞,女,1973年生,助理研究员,主要从事植物抗性生理及小麦生物技术育种方面的研究工作,发表论文12篇.
基金资助:
国家重点基础研究发展规划项目(G1999011700)

Possible mechanism of inhibition on photosynthesis of Lycium barbarum under salt stress

HUI Hongxia¹, XUXing¹, LI Shouming ²

1. Ningxia agricultural bio-technological key lab, Yinchuan 750002, China;
2. Ningxia agricultural college, Yongning 750105, China

Received:2002-06-19 Revised:2002-07-10 Online:2004-02-10

摘要/Abstract

摘要： 利用不同盐浓度处理枸杞扦插苗,在生长的不同阶段分别测定叶片光合速率及其它生理指标,结果表明:盐处理后,Pn下降,Gs减小,Ls先升高后降低,Ci先降低后升高;叶片Chl含量降低,叶绿素荧光参数Fm、Fv、Fm/Fo、Fv/Fo和Fv/Fm均降低;可溶性糖和枸杞多糖含量增加。Ci和Ls的变化说明Pn下降的原因短期内以气孔限制因素为主,长期则以非气孔限制因素为主,其它生理指标的变化及其和Pn间存在的显著相关性表明盐胁迫下枸杞光合作用降低是多因素共同作用的结果。结果还表明,含盐量低于0.5%的土壤对枸杞光合作用影响不大,证明枸杞具有一定的耐盐性。

关键词: 畜牧业, 可持续发展, 评价

Abstract: Using different concentrations of salt treating Lycium barbarum seedlings, the photosynthetic rate and other physiological indexes of leaves were measured at different growth stages. The results showed that under salt stress, the photosynthetic rate,stomatal conductance,chlorophyll content and chlorophyll fluorescence kinetics parameters Fm, Fv, Fm/Fo, Fv/Fo and Fv/Fm of leaves decreased, while the soluble carbohydrate and polysaccharides of Lycium barbarum increased. The intercellular CO2 concentration showed a trend from decrease to increase, but the Ls increased at first, and then decreased. Changes of the Ci and Ls showed that the decline of photosynthetic rate of Lycium barbraum was mainly caused by temporary stomatal limitations.In the long run, in long time, it was caused by nonstomatal limitations.Changes of other physiological indexes and significant correlations between them and Pn showed that the multiple reactions of these physiologic characteristics determined the photosynthesis declination of Lycium barbarum under salt stress. The results also indicated that the photosynthesis of Lycium barbarum was inhibited insignificantly under the soil salt content below 0.5%, which suggested that there were certain salt tolerance of Lycium barbarum.

Key words: Livestock production, Sustainable development, Assessment

中图分类号:

Q945.48

惠红霞, 许兴, 李守明. 盐胁迫抑制枸杞光合作用的可能机理[J]. 生态学杂志, 2004, (1): 5-9.

HUI Hongxia, XUXing, LI Shouming . Possible mechanism of inhibition on photosynthesis of Lycium barbarum under salt stress[J]. cje, 2004, (1): 5-9.

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