植物重金属结合体的研究现况

被引:23
作者
黄玉山
陈健敏
谭凤仪
机构
[1] 香港科技大学
[2] 香港理工学院
关键词
Phytochelatins; Heavy metal binding peptides; Heavy metal tolerance;
D O I
暂无
中图分类号
学科分类号
摘要
<正> 随着科技的发展,农业生产大量使用各种各样的除真菌剂、除害虫剂和消毒剂。另外,工业生产所排放的废水、废气均对整个生态环境造成不同程度的污染,其中尤以重金属的污染为甚。过量的重金属离子如锌、铜、镉等对生物体具有毒性,它们甚至能通过食物链进入人体而引起多种疾病。在高等植物中,重金属的毒性主要表现在以下几个方面:(1)抑制植物水分的吸收和运输;(2)抑制光合作用;(3)抑制呼吸作用;(4)抑制其它新陈代谢。这些抑制作用,最终导致植物萎黄、褪色、枯死。尽管
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页码:146 / 158
页数:13
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