水分胁迫下夏蜡梅光合作用的气孔和非气孔限制

被引:21
作者
柯世省
机构
[1] 台州学院生命科学学院
基金
浙江省自然科学基金;
关键词
水分胁迫; 光合特性; 气孔限制; 非气孔限制; 夏蜡梅; 濒危植物;
D O I
暂无
中图分类号
S685.99 [其他];
学科分类号
摘要
在水分胁迫下,夏蜡梅光补偿点、CO2补偿点、气孔阻力和活性氧产生速率升高,光饱和点、表观量子效率、最大净光合速率、羧化效率、蒸腾速率、Fv/Fm和色素含量下降,而暗呼吸速率先升后降、胞间CO2浓度先降后升。轻度和中度水分胁迫下光合能力的下降主要由气孔限制引起,在重度水分胁迫下则由非气孔限制起主要作用。
引用
收藏
页码:1 / 5
页数:5
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