核农学报2012，Vol.26Issue(2)：396-402,7.
谷胱甘肽对自毒作用下辣椒叶片光合特性的影响
EFFECTS OF GLUTATHIONE ON PHOTOSYNTHETIC CHARACTERISTICS OF PEPPER LEAVES UNDER AUTOTOXICITY
摘要
Abstract
Effects of Glutathione （GSH） with different concentrations on chlorophyll content （ Chl）, photosynthetic parameters and chlorophyll fluorescence parameters in leaves of pepper were investigated, using pepper varieties of ＇ Longjiao No. 5＇ and ＇ Qicunhong＇ under autotoxicity. Results showed that Chl, net photosynthetic rate（Pn）, stomatal conductance（Gs） and transpiration rate （Tr） declined sharply, but intercellular CO2 concentration （Ci） increased significantly after treated with leaf aqueous extracts of 50g·L^-1. The contents of Chl, Pn, Gs and Tr increased, while Ci increased at first then decreased rapidly after treated with exogenous GSH, which suggested that Pn reduction was mainly due to non-stomatal factors. Maximum photochemical efficiency of PSII （Fv/Fm） , maximal efficiency at open centers in the presence of NPQ （Fv＇/Fm＇） and actual quantum yield of PS I1 electron transport （φPSII） declined, but origin fluorescence （Fo） increased under autotoxicity. The peppers treated with GSH had higher Fv/Fm, Fv＇/Fm＇ andφPSII, while Fo decreased significantly under different concentrations of GSH compared with those treated by water or leach liquor only. It was illustrated that exogenous GSH regulated the changes of leaf gas exchange and chlorophyll fluorescence parameters, especially, by preventing the accumulation of CO2 in the leaves which was associated with an improvement in the non-stomatal factors, then alleviated the barrier of continuous pepper cropping caused byautotoxicity. There were certain alleviate effects of exogenous among the glutathione concentrations used, 50 and 30 mg· L^-1 and ＇Qicunhong＇ , respectively. GSH on the two varieties of peppers under autotoxicity, i were the optimum concentrations for ＇ Longjiao No. 5＇and ＇ Qicunhong＇ , respectively.关键词
辣椒/叶浸提液/谷胱甘肽/光合参数/荧光参数Key words
pepper/leaf aqueous extracts/GSH/photosynthetic parameters/chlorophyll fluorescence分类
农业科技引用本文复制引用
马彦霞,郁继华,张国斌,李雯琳,曹刚..谷胱甘肽对自毒作用下辣椒叶片光合特性的影响[J].核农学报,2012,26(2):396-402,7.基金项目
国家科技支撑计划 （）
国家星火计划 （）
甘肃省科技重大专项计划 （）
