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、富营养和超富营养 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 Mg2 + -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 Mg2 + -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 Ca2 + -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 。
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.
出处
《生态学报》
CAS
CSCD
北大核心
2002年第10期1616-1621,共6页
Acta Ecologica Sinica
基金
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 )
