草业学报2011，Vol.20Issue(1)：96-101,6.
温度胁迫对柱花草叶绿素荧光参数和光合速率的影响
Effects of temperature stress on chlorophyll fluorescence parameters and photosynthetic rates of Stylosanthes guianensis
摘要
Abstract
In order to explore the adaptation mechanisms of Stylosanthes guianensis to temperature stress, the responses of Chlorophyll fluorescence parameters and photosynthetic rates in leaves under low and high temperature stresses were studied. 40 days old seedlings were divided into three groups and transferred to growth chambers with different temperature treatments. The first group was subjected to temperature at 6℃ for 2 days as low temperature stress, the second group at 36℃ for 5 days as high temperature stress, and the third group at 25℃ for 5 days as the control. The experimental results showed that the chlorophyll fluorescence parameters (Fv/Fm, ΦpsⅡ , qP) and photosynthetic rates in the leaves of S. guianensis decreased significantly as treated with cold stress, and were not affected under heat stress, which indicates that photosystem Ⅱ activity in S. guianensis was more sensitive to cold stress than heat stress. In addition, ATP content and activities of RuBP-case and FBPase in the leaves of S. guianensis were also decreased under cold stress, but it was not affected under heat stress. Therefore, sufficient ATP content in leaves perhaps can prevent decreasing photosynthetic rate in S. guianensis leaves.关键词
柱花草/温度胁迫/叶绿素荧光参数/光抑制/光合速率Key words
Stylosanthes guianensis/ temperature stresss/ chlorophyll fluorescence parameters/ photoinhitition/ photosynthetic rate分类
农业科技引用本文复制引用
莫亿伟,郭振飞,谢江辉..温度胁迫对柱花草叶绿素荧光参数和光合速率的影响[J].草业学报,2011,20(1):96-101,6.基金项目
海南省自然科学基金项目(309053)资助. （309053）
