小麦和大豆叶片荧光参数对强光响应的差异

被引:7
作者
洪双松
许大全
机构
[1] 中国科学院上海植物生理研究所!上海
关键词
叶绿素荧光; 叶黄素循环; 可逆失活;
D O I
暂无
中图分类号
S313 [作物生物物理学];
学科分类号
090101 ;
摘要
<正>自然条件下高等植物的上层叶片经常受到强光的胁迫,尤其在晴天中午,光照强度远远超过叶片光合作用的饱和光强.为避免其光合器官被破坏,植物在漫长的进化过程中形成了一系列的保护机制,如改变叶片角度以减少所接受的光能,依赖叶黄素循环、光系统Ⅱ(PSⅡ)反应中心失活和PSⅡ循环电子传递的热耗散等.近年来,人们对于依赖叶黄素循环耗散掉过多激发能的保护机制研究得较多、较深入.但是,这种保护机制是否在所有植物中都能够发挥主要的作用呢?我们通过比较小麦和大豆叶片荧光参数对强光响应的异同,对这个问题进行了探讨.
引用
收藏
页码:753 / 756
页数:4
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