生态学杂志2013，Vol.32Issue(2)：344-350,7.
大气O3浓度升高对毛竹光合生理的影响
Impacts of elevated atmospheric ozone concentration on the photosynthetic physiology of Phyllostachys edulis
摘要
Abstract
In this study, open-top chambers (OTCs) were employed to approach the impacts of elevated atmospheric ozone ( O3) concentration on the photosynthesis of Phyllostachys edulis. Five treatments were installed, i. e. , CF (background atmosphere after filtrated by activated car-bon, 22-25 nL·L-1) , NF (directly introduce the background atmosphere to the gas chamber, 40-45 nL·L-1) , T, (92-106 nL·L-1 of O3, averagely 100 nL·L-1) , T2( 142-160 nL·L-1 of O3, averagely 150 nL·L-1). Under different O3 concentrations, the diurnal variations of P. edulis leaf Pn and Tr represented one-peak curves. With the increasing concentration of O3, the diurnal variations of the leaf Gs, Ci, and Ls trended to be simplified, while that of WUE be-came stable gradually. Under higher concentrations (≥100 nL·L-1)O3, the diurnal means of Pn, Ls, and WUE and the contents Chl, Chl-a, Chl-b, and Car decreased significantly, those of Gs and Tr had a significant increase, while the diurnal mean of Ci and the composition of photo-synthetic pigment changed less. In treatments T1 and T2, the Pn, Tr, and Gs were significantly correlated with the environmental factors FpdL, Tair, Ca and RH, and the Pn and Tr were signifi-cantly correlated with the PPED while the Gs was less correlated with the PPED. All the results indicated that 100 and 150 nL·L-1 of O3 could induce the leaf stomatal or non-stomatal limita-tion of P. edulis, respectively, and the stoma became insensitive to the environment, which im-pacted the leaf' s normal feedback mechanisms, increased leaf evapotranspiration, and inhibited the degradation or synthesis of photosynthetic pigments, exerting serious negative effects on the photosynthesis and dry matter accumulation of P. edulis.关键词
毛竹/臭氧/光合参数/气体交换参数/光合色素Key words
Phyllostachys edulis/ ozone/ photosynthetic parameter/ gas exchange parameter/photosynthetic pigment分类
农业科技引用本文复制引用
李迎春,李应,陈双林,庄明浩,郭子武,杨清平..大气O3浓度升高对毛竹光合生理的影响[J].生态学杂志,2013,32(2):344-350,7.基金项目
中央级公益性科研院所基本科研业务费专项(RISF6915)、国家林业公益性行业科研专项(201004008)和浙江省省院合作项目(2010SY01)资助. （RISF6915）
