【摘要】 利用叶绿素荧光技术测定了桃树‘21世纪’,‘96-3-4’,‘华玉’,‘农字6号’,‘瑞红一枝’,‘迎霜’和‘早霞露’等7个品种叶片光强依赖的叶绿素荧光特性。结果表明:在各个光强[PAR,0¹ 856μmol·（m2·s）^-1]下,表观电子传递速率r（ETR）、实际光化学效率Y（Ⅱ）和光化学淬灭qP在品种间的变化趋势一致,基本上按照‘96-3-4’,‘21世纪’,‘华玉’,‘瑞红一枝’,‘农字6号’,‘迎霜’,‘早霞露’的顺序由小变大。‘96-3-4’的最大荧光（Fm）、可变荧光（Fv）、实际光化学效率Y（Ⅱ）、表观电子传递速率r（ETR）值均高于其它6个品种。表明‘96-3-4’有较高的PSⅡ活性和较强的光合生理功能,而‘早霞露’,‘迎霜’等则光化学效率较低。更多还原

【Abstract】 The chlorophyll fluorescence technique was used to measure the light-dependent Chlorophyll fluorescence characteristics of leaves in seven peach cultivars,including ‘21stcentury’,‘96-3-4’,‘Huayu’,‘Nongzi 6’,‘Ruihongyizhi’,‘Yingshuang’and ‘Zaoxialu’. The results indicated that the changing trend of relative electron transport rate [r（ ETR） ],the effective quantum yield of PSⅡ [Y（ Ⅱ） ]and photochemical quenching（ qP） were identical under the photosynthetically active radiation（ PAR） from 0 to 1856 μmol·（ m2·s）^-1,which increased in the order: ‘96-3-4’,‘21stcentury’,‘Huayu’,‘Ruihongyizhi’,‘Nongzi6’,‘Yingshuang’,‘Zaoxialu’. The values of maximal fluorescence（ Fm）,Y（ Ⅱ）,r（ ETR） of ‘96-3-4’were higher than those of the other cultivars. All those suggested that the photosynthetic physiological function of ‘96-3-4’was the best,and that of ‘Yingshuang’and ‘Zaoxialu’the worst.更多还原