激光与增强的紫外-B辐射对花生幼苗光合作用的影响  

Effects of Laser and Enhanced UV-B Radiation on Photosynthesis of Peanut Seedlings

作　　者：高晓玲[1] 何应森[1] 徐晓燕[1] 

机构地区：[1]成都师范学院,四川成都611130

出　　处：《贵州农业科学》2013年第7期36-38,共3页Guizhou Agricultural Sciences

基　　金：四川省科技厅应用基础研究项目(2010JY0039)

摘　　要：为有效应对增强的紫外-B辐射对作物的影响,利用低剂量的He-Ne激光和紫外-B处理花生幼苗,研究激光和增强的紫外-B对花生光合作用的影响。结果显示:增强的紫外-B辐射显著降低了花生幼苗光合色素含量和净光合速率,导致叶绿体膜电导率提高,抑制了叶绿体的电子传递速率,使叶绿体光合作用酶的活性降低。而激光与紫外-B辐射复合处理能显著提高花生幼苗的光合色素含量和净光合速率,叶绿体膜电导率降低,紫外-B辐射造成的膜离子泄漏率减小;同时激活光合作用酶的活性。He-Ne激光对受增强紫外-B辐射伤害的花生幼苗光合作用具有明显的修复和促进作用。Effects of the use of low doses of He-Ne laser and the enhanced UV-B on peanut seeding were studied to effectively deal with the influence of enhanced UV-B radiation on crops. The results show that the enhanced UV-B radiation reduces the pigment content of peanut seedling and net photosynthetic rate dramatically, resulting in the increase of chloroplast membrane conductivity and the inhibition of chloroplast electron transfer rate and the decrease of activity of the chloroplast photosynthesis enzyme. The composite processing of laser and enhanced UV-B radiation can significantly increase the content of photosynthetic pigments of peanut seedlings and net photosynthetic rate, reduce the chloroplast membrane conductivity and the membrane ion leakage rate caused by UV-B radiation. At the same time, it activates the activity of photosynthesis enzyme in some degree. Research shows that He-Ne laser has apparent effect of repairing and promotion on photosynthesis of peanut seedlings damaged by enhanced UV-B radiation.

关 键 词：激光 紫外-B辐射 花生 光合作用 

分 类 号：S565.2[农业科学—作物学]