水体营养盐质量浓度对苦草光合荧光特性的影响  

Effect of Water Nutrient Concentration on Photosynthetic Fluorescence Characteristics of Vallisneria natans

作　　者：蔡炜[1] 宋玉芝[1,2] 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008

出　　处：《环境科学研究》2009年第8期907-912,共6页Research of Environmental Sciences

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-419);江苏省高校自然科学基金项目(07KJD610136)

摘　　要：通过室内培养,利用水下饱和脉冲荧光仪(Diving-PAM)研究了不同质量浓度的营养盐对苦草光合荧光特性的影响.结果表明:①水体中N,P营养盐质量浓度的高低对苦草叶片PSⅡ和Fv/Fm影响不显著(P>0.05).②在日变化过程中,各处理组苦草的ΔFv/Fm′均呈升—降—升的变化趋势,但方差分析显示,水体ρ(TN)和ρ(TP)变化不直接影响苦草的ΔFv/Fm′(P>0.05).③试验第4天各处理组的苦草叶片光响应能力大小依次为处理组B>处理组C>处理组D>处理组A;在苦草生长初期,质量浓度较高的营养盐可以提高苦草叶片的光响应能力和捕光能力,并可增强叶片的光合活性;从整个试验过程来说,分别是处理组B的ρ(TN)和处理组C的ρ(TP)更利于苦草的生长.The effect of water nutrient concentration on photosynthetic fluorescence characteristics of Vallisneria natans was studied using Diving-PAM. The experiment was studied on water samples incubated inside. The results were as follows： （1） The water nutrient concentration had no significant influence on photosystem Ⅱ and Fv/Fm of Vallisneria natans （P 〉 0.05）. （2） During diurnal variation, the Vallisneria natans＇s AF,/Fro＇ of treatment groups showed an up-down-up trend. Variance analysis showed that the water nutrient concentrations of TN and TP had no significant influence on △F v/Fm′ of Vallisneria natans （P 〉 0.05）. （3） In the 4th day of the experiment, the order of lightresponding ability of Vallisneria natans＇s leaves in different groups was： Treatment B 〉 Treatment C 〉 Treatment D 〉 Treatment A. In early experiments, the higher nutrient concentration could improve the light response ability and the light-harvesting capacity of Vallisneria natans＇s leaves, and enhance the photosynthetic activity of the leaves. Within the entire experiment, the level of water nutrient concentration in B treatment group and C treatment group were better for the growth of Vallisneria natans.

关 键 词：TN TP 苦草 FV/FM ΔFv/Fm′ 快速光响应曲线 光合参数 

分 类 号：Q948.8[生物学—植物学] X524[环境科学与工程—环境工程]