摘要
5℃低温弱光(50μmol·m-2·s-1)处理3d导致番茄叶片Pn、Fv/Fm、ФPSⅡ的下降,但F0并没有变化;强光(800μmol·m-2·s-1),25℃条件恢复5h,番茄成熟叶片Pn、Fv/Fm基本能得到恢复,ФPSⅡ则略有下降;而成长叶片Fv/Fm以及ФPSⅡ却显著下降,F0也明显增加.恢复3d后成熟叶光合作用、叶绿素荧光参数完全得到恢复,而成长叶虽稍有恢复但仍保持较低水平.
Exposure of tomato plants to chilling 5℃ under low light (60μmol·m-2·s-1)decreased Pn,Fv/Fm,ΦPSⅡ,but not affect F0.Recovered 5h under high light 800μmol·m-2·s-1 and 25℃,Pn and Fv/Fm of developed leaves recovered in great degree,but slightly decreased ΦPSⅡ. However,Fv/Fm and ΦPSⅡ of developing leaves decreased rapidly.Recovered 3d,Pn,Fv/Fm,ΦPSⅡ of developed leaves arose to a value similar to control,but recovered slowly for developing leaves.
关键词
低温弱光胁迫
叶片恢复
番茄
强光
叶绿素荧光
光合作用
植物光抑制
Lycopersicon esculentum Mill
chilling under low light
high light
different leaves
photosynthesis
chlorophyll fluorescence characters
