人工湿地污水处理对三种植物幼苗叶绿素荧光特性的影响(英文)  

Effect of wastewater treatment on chlorophyll fluorescence parameters in leaves of seedlings of three plant species in constructed wetland

作　　者：李志刚[1] 蒋越华[1] 陈海凤[1] 黄海连[1] 李素丽[1] 

机构地区：[1]广西大学农学院,南宁530005

出　　处：《广西农业科学》2009年第1期34-38,共5页Guangxi Agricultural Sciences

基　　金：Plan of Science and Technology from Guangxi(0719005-2-2B,0816002-4)

摘　　要：为探讨在人工湿地污水处理条件下植物幼苗叶片的光合反应机制,通过模拟人工湿地,对薏米、文殊兰和蜘蛛兰幼苗进行污水淹灌处理,采用PAM-2000叶绿素荧光仪分别对生长在人工湿地和陆地自然条件下植物幼苗的叶绿素荧光参数进行测定和比较分析。结果表明:在人工湿地条件下,三种植物幼苗叶片的原初光能转化效率(Fv/Fm)显著降低;同时,在人工湿地环境下三种植物的Fo、Fm和qP也极显著低于陆地生境对照的相应值,qN值则极显著高于对照的相应值。因此,在人工湿地环境下,植物幼苗叶片的PSII反应中心结构和功能遭到破坏而部分关闭,光合电子传递受阻,光能利用与光化学转化能力下降,吸收的光能更多的以热能形式耗散。此外,不同植物间的荧光参数具有明显的差别,以蜘蛛兰的各项荧光参数值较薏米和文殊兰高,且降低或升高的幅度均低于其他植物。可见蜘蛛兰适应人工湿地环境的能力强于其他两种植物。In order to study the effects of wastewater on photosynthetic reaction mechanism in leaves of plant seedlings in construeted wetland, Coix aquatica Roxb., Crinum asiaticum and Hymenoeallis Americana were irrigated with effluent in simulative constructed wetland, and the chlorophyll fluorescence parameters of three plant seedlings in constructed wetland and lerrestrial natural environment were measured by using a portable PAM-2000 fluorometer. The rcsuhs showed that, compared with the plant seedlings grown in natural environment, the maximal photochemical efficiency of PS II in the （lark （Fv/Fm） in leaves of the three species was decreased significantly in constructed wetland. Simultaneously, （ompared to that in terrestrial natural environment, the values of photochemical quenching （qP）, minimal fluorescence （Fo） and maximal fluorescence （Fro） in leaves in constructed wetland were decreased significantly, while the values of non-photochemical quenching （qN） were increased obviously. Therefore, the PS II reaction center and functions in leaves of plant seedlings were inhibited under the constructed wetland condition, which weakened the light energy utilization and transformation capability and absorbed light energy was dissipated through heat energy mostly. Moreover, the fluorescence parameters were different among the three plant species, the Fo, Fm, Fv/Fm, qP, and qN for flymenocaHis Americana in the constructed wetland were the highest, and the decreased or increased extents of them for Hymenocallis Americana was the lowest. Among the three species, Hymenoeallis Americana was more tolerant than the others in the constructed wetland.

关 键 词：人工湿地 污水处理 幼苗 叶绿素荧光 

分 类 号：Q945.11[生物学—植物学]