首页 | 本学科首页   官方微博 | 高级检索  
   检索      

不同N、P浓度条件下竹叶眼子菜的生理反应
引用本文:王斌,李伟.不同N、P浓度条件下竹叶眼子菜的生理反应[J].生态学报,2002,22(10):1616-1621.
作者姓名:王斌  李伟
作者单位:中国科学院武汉植物研究所水生植物生物学实验室,武汉,430074
基金项目:中国科学院生命科学与生物技术创新青年科学家小组资助项目,中国科学院“百人计划”资助项目,中国科学院武汉植物研究所所长基金资助项目 ( 330 1 5 1 0 5 )
摘    要:比较研究了不同氮、磷浓度条件(分别对应于寡营养、中营养、富营养和超营养4种水质状况)培养下竹叶眼子菜的可溶性糖含量、生物量、SOD和POD活性以及ATPase活性变化。在对照(寡营养)中生长的竹叶眼子菜的可溶性糖含量、生物量明显高于其他3组不同氮、磷浓度的处理;试验期间,SOD和ATPase的活性一般表现为先上升再下降的格局,POD则相反 ;SOD活性在第1周内上升,对照条件下活性最小;POD活性在前2周内下降,对照条件下下降幅度最小;叶绿体Mg^2 -ATPase活性在前3周内呈现上升格局,对照条件下表现出较低的活性,线粒体Mg^2 -ATPase活性在前2周出现上升格局,对照条件下该酶活性较低,但其峰值在第3周出现;叶绿体和线粒体Ca^2 -ATPase活性在前2周均呈现上升趋势,超富营养条件下该酶活性最大,且酶活性一般呈现随着氮、磷浓度升高而升高的格局。试验表明竹叶眼子菜比较适合寡营养和中营养水质条件,氮、磷浓度的升高将影响其生理功能,过高的营养条件对竹叶眼子菜是一种胁迫,可抑制其生长。竹叶眼子菜对氮、磷浓度变化虽有一定耐性,但耐性会随时间延长而变弱。

关 键 词:N浓度  湖泊富营养化  水生植物  P浓度  竹叶眼子菜  生理反应
文章编号:1000-0933(2002)10-1616-06
收稿时间:2001/4/19 0:00:00
修稿时间:2002/4/22 0:00:00

Physiological Reactions of Potamogeton malaianus to Different N and P Concentrations in the Growth Medium
WANG Bin and LI Wei.Physiological Reactions of Potamogeton malaianus to Different N and P Concentrations in the Growth Medium[J].Acta Ecologica Sinica,2002,22(10):1616-1621.
Authors:WANG Bin and LI Wei
Institution:Laboratory of Aquatic Plant Biology; Wuhan Institute of Botany; Chinese Academy of Sciences; Wuhan; China
Abstract:The soluble sugar contents, biomass and the activities of superoxide dismutase (SOD), peroxidase (POD) and ATPase of %Potamogeton malaianus% cultured in media with different N and P concentrations corresponding to oligo-, meso-, ertro- and hypertrophic conditions respectively were analysed. %P. malaianus% in the control experiment (oligotrophic) had significantly higher soluble sugar content and biomass than those in other different N and P treatments. In general, the activities of SOD and ATPase increased first and decreased later during the experiment, while that of POD showed a contrary pattern. SOD activities increased in the first week while POD activities decreased in the first two weeks, and plants from the control experiment had the smallest changes of activities. The activities of chloroplast and mitochondria Mg 2+-ATPase showed rising patterns during the first three and two weeks respectively, and plants from the control experiment had lower activities, while mitochondria Mg 2+-ATPase showed the highest activities in the third week. Both Ca 2+-ATPase activities of chloroplast and mitochondria increased in the first two weeks. The plants from the hypertrophic condition had the highest activities, and the activities increased with increased N and P concentrations in general. The results indicated that %P. malaianus% was more preferable to oligo- and mesotrophic waters, the raised N and P concentrations were a stress to %P. malaianus%, and could affect its physiological functions and restrain its growth. Although %P. malaianus% could resist the changes of N and P concentrations to some extent, its tolerance gradually weakened as time went on.
Keywords:Potamogeton malaianus% Mig    physiological reaction  eutrophication  stress  tolerance
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号