Hg^(2+)对蒜鳞茎生长的毒害效应  

Toxication of Hg^(2+) Pollution on Garlic

作　　者：尤文鹏[1] 施国新[1] 丁小余[1] 杨顶田[1] 解凯彬[1] 常福辰[1] 宋东杰[1] 赵春[1] 

机构地区：[1]南京师范大学生命科学学院,南京210097

出　　处：《南京师大学报（自然科学版）》2000年第2期76-80,共5页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金! (39770 0 46 );江苏省自然科学基金! (BK9710 7)

摘　　要：蒜鳞茎在不同浓度 Hg2 + 的水溶液中培养 ,随着 Hg2 + 浓度升高或处理时间的延长 ,根的生长速率递减 ,30 0 mg/L组 4 d后几近停止 ;根尖细胞有丝分裂指数下降 ,分裂异常比率增高 ;可溶性糖和蛋白含量下降 ;叶绿素含量也出现明显下降趋势 ,叶绿素 a比叶绿素 b下降幅度更大 ;过氧化物酶活性在低浓度范围内 (50～ 2 0 0 mg/L )高于对照组 ,但高浓度 (30 0 mg/L )时或低浓度长时间处理时 ,其活性下降明显 .Hg2 + 对蒜瓣有极强的毒害效应 .The effects of Hg 2+ solution of different concentrations on garlic were studied.With the increase of Hg 2+ concentration or treatment time,the rate of root growth decreased successively or stopped,the mitosis index of root tip cells reduced,the number of anomalous dividing cells rose, soluble protein and sugar decreased,the content of chlorophyll reduced too,what's more,the contents of chlorophyll a decreased faster than the content of chlorophyll b,the activity of peroxidase increased under the treatment with low concentration of Hg 2+ in short peroid,but decreased with high concentration of Hg 2+ or with time's going on..Hg 2+ pollution had very toxic influence on garlic.

关 键 词：蒜 有丝分裂 鳞茎 生长 毒害效应 汞离子 

分 类 号：X503.231[环境科学与工程—环境工程] R994.6[医药卫生—毒理学]