研究了汞离子胁迫下金银莲花〔Nymphoides indica ( L .) Kuntze]根受害情况、根部过氧化物酶活性和新叶叶绿素含量的变化。根部受害程度随汞离子浓度升高和处理时间的延长而加重。低浓度 Hg^{2 +}短时间处理后根过氧化物酶活性升高, 而高浓度 Hg^{2 +}长时间处理后根过氧化物酶活性下降, 且随着Hg^{2 +}浓度的升高或处理时间的延长过氧化物酶活性均呈下降趋势。 新叶叶绿素含量对 Hg^{2 +}胁迫的反应与根过氧化物酶活性的变化相似。

The injury degree of roots, the activity of peroxidase in roots and chlorophyll content in new leaves of Nymphoides indica by the stress of Hg^{2 +} are reported .Injury degree of roots were intensitied with the increase of Hg^{2 +} concentrationor as treatment time is continued .The activity of perox idase increased under the treatement with low concentration of Hg^{2 +} in a short time, but decreased as treatment time is continued. The stress of Hg^{2 +}had the similiar effects on chlorophyll content in new leaves .