干旱条件下冬小麦不同叶龄叶绿素荧光及叶黄素循环组分的变化(英文)

被引:66
作者
许长成
李德全
邹琦
张建华
机构
[1] 山东农业大学植物科学系!泰安,山东农业大学植物科学系!泰安,山东农业大学植物科学系!泰安,香港浸会大学生物系
关键词
干旱; 叶绿素荧光; 叶黄素循环; 冬小麦;
D O I
暂无
中图分类号
Q945 [植物生理学];
学科分类号
0903 ;
摘要
干旱条件下冬小麦叶片光化学效率(Fv/Fm)的降低伴随着叶黄素循环组分玉米黄质含量的增加。干旱初期,Fv/Fm 的降低约在暗置过夜后完全恢复。当干旱诱导的玉米黄质含量的增加达最大值时,Fv/Fm 不可逆下降,Fo 上升,表明发生了光破坏。与老叶相比,干旱条件下功能叶具有较高的玉米黄质含量,对光破坏的抗性较强。推测干旱条件下老叶不可逆衰老与其依赖于叶黄素循环的耗散过剩光能能力的下降有关。
引用
收藏
页码:29 / 37
页数:9
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