夜间低温对2种光强下榕树叶绿素荧光的影响  

Effects of low temperature stress at night on chlorophyll fluorescence characteristics in leaves of Ficus microcarpa growing under two levels of irradiance

作　　者：胡文海[1] 黄黎锋[2] 肖宜安[1] 吴杨[1] 

机构地区：[1]井冈山师范学院生命科学系,江西吉安343009 [2]浙江大学园艺系,浙江杭州310029

出　　处：《浙江林学院学报》2005年第1期20-23,共4页Journal of Zhejiang Forestry College

摘　　要：为探明夜间低温对榕树Ficusmicrocarpa光合机构的伤害及日间不同光强在伤害中所起的作用,利用叶绿素荧光技术研究了夜间低温胁迫后生长于全光照(强光)与遮荫(弱光)条件下榕树叶片叶绿素荧光的日变化。结果表明:夜间低温能导致榕树叶片发生光抑制,但并没有破坏光合机构。夜间低温后,遮荫条件下,榕树叶片可通过增强光化学能力和热耗散途径来耗散过剩光能,保护光合机构免受伤害;而强光下,榕树叶片则不能很好地通过光化学与热耗散途径来消耗过剩光能,从而导致光合机构发生破坏性伤害。The effects of low temperature at night on chlorophyll fluorescence characteristics in leaves of Ficus microcarpa growing in full sunlight(high light)and in shade (low light)site were examined.The results showed that low temperature induced photoinhibition in leaves of Ficus microcarpa,but didnot damage photosynthetic apparatus.And the plant under low light after low temperature at night can protect the photosynthetic apparatus by higher photochemical and non-photochemical pathway.The plant under high light after low temperature at night can not dissipated excess energy by photochemical and non-photochemical pathway,so high light after low temperature at night damage photosynthetic apparatus deeply.

关 键 词：植物生理学 榕树 夜间低温 光照强度 叶绿素荧光 光抑制 

分 类 号：S718.43[农业科学—林学] Q945.11[生物学—植物学]