3种冬青属植物气体交换参数及叶绿素荧光特性  

Leaf gas exchange and chlorophyll fluorescence parameters in three species of Ilex

作　　者：王利英[1] 楼炉焕[2] 王超[3] 黄奇[2] 顾敏[2] 

机构地区：[1]浙江林学院园林学院,浙江临安311300 [2]浙江林学院林业与生物技术学院,浙江临安311300 [3]上海市政工程设计研究总院浙江分院,浙江杭州310004

出　　处：《浙江林学院学报》2009年第1期27-31,共5页Journal of Zhejiang Forestry College

基　　金：浙江省科学技术攻关项目(2004C32009)

摘　　要：选择绿冬青Ilex viridis,浙江冬青I.zhejiangensis和构骨I.cornuta等3种植物,对其光合作用特性进行了研究。结果表明,绿冬青、浙江冬青和构骨等的光补偿点分别为20.94,29.91和24.02μmol.m-2.s-1,无显著差异(P>0.05);光饱和点分别为1 204.29,1 305.10和1 516.67μmol.m-2.s-1,存在显著差异(P<0.05),其中构骨明显高于其他2个种;最大净光合速率分别为3.33,5.53和8.43μmol.m-2.s-1,均存在显著性差异(P<0.05)。此外,构骨的表观电子传递速率(ETR)为60.520,显著高于绿冬青(40.217)和浙江冬青(19.900)(P<0.05),分别是绿冬青和浙江冬青的1.51和3.04倍;构骨的非光化学猝灭(qN)为0.947,分别是绿冬青(0.859)和浙江冬青(0.733)的1.10和1.29倍,其差异性达显著水平(P<0.05),说明构骨具有较高的电子传递活性和防御光抑制破坏的能力。The gas exchange and chlorophyll fluorescence parameters in leaves of three broadleaf tree species： Ilex viridis, L zhejiangensis, and L cornuta, were determined under field conditions. Results showed that there were no significant differences（P〉0.05） for light compensation point： （20.94 μmol·m-2·s^-1 in I. viridis, 29.91 μmol·m-2·s^-1 in I. zhejiangensis, and 24.02 μmol·m-2·s^-1 in I. cornuta）. The light saturation point of I. cornuta was significantly greater（P〈0.05） （1 516.67 μmol·m-2·s^-1） than I. viridis （1 204.29 μmol·m-2·s^-1） and I.zhejiangensis （1 305.10 μmol·m-2·s^-1）. Also, the maximum net photosynthetic rate in L cornuta was significantly greater （P〈0.05） for CO2 （8.43 μmol·m-2·s^-1）than L viridis （3.33 μmol·m-2·s^-1） and L zhejiangensis （5.53 μmol·m-2·s^-1）. Finally, electron transport rate（ETR）, photosystem （PS） Ⅱ efficiency（Yield）, and non-photochemical quenching（qN） in the leaf were much higher（P〈0.05） in I. cornuta than in L zhejiangensis and I. viridis. Thus,I. cornuta had a higher photosynthetic capacity and stronger utilization ability for light energy, and its quantum yield of PS II electron transport and the potential capacity of heat dissipation were greater（P〈0.05）. [Ch, 4 fig. 2 tab. 12 ref.]

关 键 词：植物学 气体交换 叶绿素荧光 浙江冬青 绿冬青 构骨 

分 类 号：S718.3[农业科学—林学]