Hg^(2+)胁迫下玉米生理生态变化的研究  

Physiological and ecological response of maize to mercury stress

作　　者：刘玲[1] 杨双春[1] 张洪林[1] 

机构地区：[1]辽宁石油化工大学石油化工分院,辽宁抚顺113001

出　　处：《生态环境》2004年第2期161-163,共3页Ecology and Environmnet

基　　金：上海市科委重大项目(02DZ1201);中国博士后基金项目(第31批);上海市博士后科技基金项目

摘　　要：通过砂培实验,研究汞胁迫下玉米的生理生态指标包括叶绿素含量、根系活力、游离脯氨酸含量的变化。结果表明,汞对玉米的胁迫是浓度和时间双重因子的作用:在低汞浓度、短时间内,叶绿素含量、根系活力及游离脯氨酸含量均有上升的趋势;在高汞浓度、长时间内,各生理指标均严重下降。各生理指标对汞的敏感度略有差异:游离脯氨酸含量>根系活力>叶绿素含量;其中脯氨酸含量可以作为汞污染的一个监测指标。In this paper, sand-culture medium was used to investigate the physiological and ecological response of maize to mercury pollution stress, including the contents of chlorophyll, the activity of root and free proline. The results show that the toxicity of Hg2+ to maize is controlled by time and concentration of Hg2+: in the low concentration and short time, the indexes increased and decreased afterwards with the increase of the concentration of Hg2+. Every index of the sensitivity to Hg2+ toxicity is different: free proline > the activity of root > the chlorophyll; the contents of free proline may be regarded as the monitoring index of Hg2+ pollution.

关 键 词：汞胁迫 叶绿素含量 根系活力 游离脯氨酸含量 

分 类 号：X171.5[环境科学与工程—环境科学]