OALib Journal期刊
Cd2+和Cr6+对慈姑（SagittariasagittifoliaL.）的毒害效应
DOI: 10.18307/2006.0209
Keywords: Cd2+ ,Cr6+ ,慈姑 ,毒害
Abstract:
以水生经济植物慈姑(SagittariasagittifoliaL.)为实验材料,通过模拟水体Cd2+和Cr6+污染环境,研究了两种单-离子处理对慈姑的毒害影响.结果表明:随着水体Cd2+、Cr6+浓度增大,慈姑叶绿素含量与根细胞质膜透性先升高后降低;Cd2+浓度增大,根和叶的POD活性,叶的SOD活性、丙二醛(MDA)含量及根的超氧阴离子(O2-)产生速率均是先升后降;根和叶的CAT活性、根的SOD活性、MDA含量和叶的O2-产生速率则逐渐升高;而Cr6+处理时,MDA含量、根的SOD、CAT、POD活性均随浓度增大而升高,O2-产生速率和叶的SOD、CAT、POD活性则升高后降低;Cd2+和Cr6+污染都对慈姑产生毒害,其毒害的效应既有相似性又有差异,同浓度条件下根的受害程度比叶严重.
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