文献类型：期刊文献

中文题名：重金属Cd^(2+)对结缕草叶片光合特性的影响

英文题名：EFFECTS OF Cd^(2+) STRESS ON PHOTOSYNTHETIC CHARACTERISTICS IN LEAVES OF Zoysia japonica

作者：刘俊祥[1] 孙振元[1] 巨关升[1] 韩蕾[1] 钱永强[1]

第一作者：刘俊祥

机构：[1]中国林业科学研究院林业研究所/国家林业局林木培育重点实验室

年份：2009

卷号：23

期号：6

起止页码：1050-1053

中文期刊名：核农学报

外文期刊名：Journal of Nuclear Agricultural Sciences

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：中央级公益性科研院所基本科研业务专项资金项目(200704)

语种：中文

中文关键词：镉;结缕草;胁迫;光合作用;叶绿素荧光

外文关键词：Cd ; Zoysia japonica ; stress ; photosynthesis ; chlorophyll fluorescence

分类号：S513.01;X503.233

摘要：用水培法研究了重金属Cd2+胁迫对结缕草叶片光合气体交换、叶绿素荧光参数、光能分配及叶绿素含量的影响。结果表明,Cd2+胁迫下,除胞间CO2浓度(Ci)外,结缕草叶片净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)均较对照降低,差异显著;最小初始荧光(F0)、最大荧光(Fm)、光下最大荧光(Fm′)、光下最小荧光(F0′)、稳态荧光(Fs)、最大量子产量(Fv/Fm)、实际量子产量(Fv′/Fm′)、实际光化学效率(ΦPSⅡ)、相对电子传递速率(rETR)、光化学猝灭系数(qp)等均较对照显著降低,而20 d时处理叶片的非光化学猝灭系数(NPQ)较对照显著升高;在光能分配方面,除PSⅡ反应中心过剩激发能C的值无显著性变化,Cd2+胁迫显著降低了结缕草叶片PSⅡ光化学反应消耗的光能A值,显著提高了通过天线热耗散消耗的光能B值;尽管叶绿素与类胡萝卜素含量无显著变化,但30 d的Cd2+胁迫仍使二者含量降低。
Effects of Cd^2＋ stress on photosynthetic, gas exchange parameters, chlorophyll fluorescence characteristics, excitation energy distribution and the content of photosynthetic pigment in leaves of Zoysia japonica were studied. After the stress of Cd^2＋ , net photosynthetic rate （ Pn ）, transpiration rate （Tr） and stomata conductance （ Gs ） decreased significantly except of intercellular CO2 concentration （ Ci ）. Minimum fluorescence （ F0 ）, maximum fluorescence （ Fm ）, maximum fluorescence under light （ F＇m ）, minimum fluorescence under light （ F＇0 ）, steady - state fluorescence （ Fs ）, maximal photochemical efficiency of PS 1I （Fv/Fm）, photochemical efficiency of PS Ⅱ in the light（ F＇s/F＇m ）, the effective PS 11 quantum yield （ФPSⅡ）, the relative electron transport rate （ rETR ） and photochemical quenching coefficient （ qp ） all decreased significantly compared with controL, whereas nonphotochemical quenching coefficient （NPQ） increased significantly on 20th day after Cd^2＋ treatment. In the aspect of excitation energy distribution, A had decreased significantly, B had increased significantly, but the variety of C was not changed significant after Cd^2＋ treatment. Although under the Cd^2＋ stress the contents of chlorophyll and carotenoid did not vary significantly, but decreased compared with the control.