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夜间低温对2种光强下榕树叶绿素荧光的影响
引用本文:胡文海,黄黎锋,肖宜安,吴杨.夜间低温对2种光强下榕树叶绿素荧光的影响[J].浙江林学院学报,2005,22(1):20-23.
作者姓名:胡文海  黄黎锋  肖宜安  吴杨
作者单位:1. 井冈山师范学院,生命科学系,江西,吉安,343009;浙江大学,园艺系,浙江,杭州,310029
2. 浙江大学,园艺系,浙江,杭州,310029
3. 井冈山师范学院,生命科学系,江西,吉安,343009
摘    要:为探明夜间低温对榕树Ficus microcarpa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.图3表1参14

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
文章编号:1000-5692(2005)01-0020-04

Effects of low temperature stress at night on chlorophyll fluorescence characteristics in leaves of Ficus microcarpa growing under two levels of irradiance
HU Wen-hai,Huang Li-feng,XIAO Yi-An,WU Yang.Effects of low temperature stress at night on chlorophyll fluorescence characteristics in leaves of Ficus microcarpa growing under two levels of irradiance[J].Journal of Zhejiang Forestry College,2005,22(1):20-23.
Authors:HU Wen-hai  Huang Li-feng  XIAO Yi-An  WU Yang
Abstract: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.
Keywords:tree physiology  Ficus microcarpa  low temperature at night  irradiance  chlorophyll fluorescence characteristics  photoinhibition
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