对3个桑品种生理生态特征的比较研究  

Comparative Studies of Ecophysiological Characteristics of Three Mulberry Varieties

作　　者：蒋文伟[1] 钟泰林[2] 石柏林[2] 张科良[3] 田海涛[4] 温国胜[4] 

机构地区：[1]浙江林学院园林学院,临安311300 [2]浙江林学院植物园,临安311300 [3]临安市农业局农业技术推广中心,临安311300 [4]浙江林学院林业与生物技术学院,临安311300

出　　处：《蚕业科学》2007年第2期264-267,共4页ACTA SERICOLOGICA SINICA

基　　金：浙江省"十五"重点科技项目(编号011037);浙江省临安市科技发展计划项目(编号04049);浙江省教育厅科技项目(编号20050189)

摘　　要：研究了湖桑32号、农桑14号和丰田2号等3个桑树品种的光合特征及叶绿素的部分参数。3个品种的光补偿点为3.58～50.10μmol/(m2.s),表观量子效率为0.022～0.051,湖桑32号>农桑14号>丰田2号;光饱和点为1 436.78～1 571.43μmol/(m2.s),丰田2号>农桑14号>湖桑32号;CO2补偿点为62.87～103.40μmol/mol,CO2饱和点为921.88～1 055.56μmol/mol,其中,湖桑32号的CO2补偿点和饱和点、羧化效率及二磷酸核酮糖羧化酶的最大再生速率(Pmax)均较显著高于其它两个品种;叶绿素相对含量丰田2号>农桑14号>湖桑32号,表明丰田2号单位叶面叶绿体数量较多,具有相对较大的光合潜力;光化学效率和光合电子传递效率分别为0.746 2～0.801 8、1.58～3.43,其中丰田2号的叶绿素荧光参数值显著高于其它2个品种,具有一定光适应和抗逆性能力。Photosynthetic characteristics and chlorophyl of three mulberry varieties, Husang 32, Nongsang 14 and Fengtian 2, were studied comparatively. The results were as follows. The light compensation point （LCP） of mulberry varieties was 3.58 -50. 10 μmol/（ m^2·s）, and apparent quantum efficiency （AQE）was 0. 022 - 0. 051 ,the order of compensation point from high to low was Husang 32 〉 Nongsang 14 〉 Fengtian 2, The light saturation point （LSP）of mulberry varieties was 1 436.78 -1 571.43 μmol/（m^2·s）, and the order of that was Fengtian 2 〉 Nongsang 14 〉 Husang 32. The CO2compensation point （CCP）of mulberry varieties was 62.87 -103.40 μmol/mol, and the CO2 saturation point （CSP）of mulberry varieties was 921.88 -1 055.56 μmol/mol, among which, CCP, CSP,CE and RuBP＇ maximal regeneration rate （ Pmax ） of Husang 32 were all more than ones of other two mulberry varieties. The relative content of chlorophyll contents of mulberry varieties was Fengtian 2 〉 Nongsang 14 〉 Husang 32, which showed that the quantities of per leaf area of Fengtian 2 was more than ones of others, and Fengtian 2 has biggest photosynthetic potentiality. The photosynthetic chemical efficiency （Fv/Fm）and photon transporting efficiency （ETR）of mulberry varieties were 0. 746 2 -0. 801 8, 1.58 -3.43 respectively. Among them, Fengtian 2 had higher values in chlorophyll fluorescence parameter, which showed that Fengtian 2 had more potentiality of photo acclimation and resistance to stress.

关 键 词：桑树品种 光合特性 叶绿素荧光 生理生态因子 

分 类 号：S888.3[农业科学—特种经济动物饲养]