华南农业大学学报Issue(4)：548-552,5.
水淹胁迫对4种园林绿化树种幼苗气体交换参数的影响
Effects of Waterlogging Stress on Leaf Gas Exchange Parameters of Four Kinds of Garden Greening Seedlings
摘要
Abstract
Effects of waterlogging stress on leaf gas exchange of Michelia chapensis, Schima wallichii, Rh-odoleia championii and Cinnamomum camphora were investigated so as to understand the physiological mechanism of waterlogging resistance of these four kind seedlings and provide a reference for the selection of waterlogging resistant species in southern China .The results showed that net photosynthetic rate ( Pn) of the four kind seedlings tended to decrease with increasing waterlogging time .Pn of M.chapensis, S. wallichii, R.championii and C.camphora reached their minimum with values of 1.87, 0.43, -0.26 and 0.62 μmol· m-2 · s-1 , respectively, in 35 days under waterlogging stress , and their stomatal con-ductance (Gs) tended to decrease with values of 0.032, 0.005, 0.008 and 0.006 mol· m-2· s-1, re-spectively, in 35 days under waterlogging stress;intercellular mole fraction of CO2(xCO2) of M.chapen-sis,S.wallichii and C.camphora decreased followed by an increase , whereas xCO2 of R.championii con-tinuously increased;with increasing waterlogging time , transpiration rate ( Tr) of M.chapensis, S.walli-chii, R.championii and C.camphora tended to decrease with values of 0.04, 0.13, 0.02, 0.10 mmol· m-2 · s-1 , respectively , in 35 days under waterlogging stress .The waterlogging resistance of the four kind seedlings was evaluated using principal component analysis , and the order of waterlogging re-sistance was M.chapensis >S.wallichii >C.camphora >R.championii.关键词
水淹胁迫/幼苗/气体交换参数/主成分分析Key words
waterlogging stress/seedling/gas exchange parameter/analysis of principal component分类
农业科技引用本文复制引用
郭淑红,薛立,杨振意,张柔..水淹胁迫对4种园林绿化树种幼苗气体交换参数的影响[J].华南农业大学学报,2013,(4):548-552,5.基金项目
广东省林业局资助项目 （）
