重金属胁迫对植物有机酸代谢影响研究进展  

Research advance on effects of heavy metal stress on plant organic acid metabolism

作　　者：陈美静[1] 刘倩雯[1] 谭佳缘 李雪梅[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,辽宁沈阳110034

出　　处：《广东农业科学》2015年第24期86-91,共6页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(31270369;31470398);沈阳师范大学生态与环境研究中心主任基金(EERC-K-201302);沈阳师范大学大学生创新训练项目

摘　　要：目前重金属污染土壤情况日趋严重,影响植物的正常生长发育和生理生态特征,威胁农产品安全。有机酸常被认为在植物抵抗重金属污染中起重要作用,可与金属元素发生螯合作用,使离子态金属转变成低毒或无毒的螯合态,进而提高植物抵御重金属胁迫的能力,对修复遭受重金属污染的土壤作用显著。介绍了近年来土壤在遭受镉、铅、铝、锌、铜等重金属污染的逆境条件下,植物体内及根系分泌有机酸含量与组成的变化情况,包括草酸、苹果酸、柠檬酸、酒石酸、琥珀酸、乳酸、乙酸等有机酸;并阐述其提高抗重金属胁迫的作用机理,提出了重金属胁迫下植物有机酸解毒的研究方向。Recently,the soil heavy metal pollution is increasingly serious,the normal growth and physiological ecology characteristics of plants are affected,and then threats the safety of agricultural products. Organic acids can repair the pollution soil,make the ion metal state transformed into the low-toxic or non-toxic state through chelating metal elements,for increasing the resistance of plants to heavy metal stress. So organic acids are often thought to play an important role in plant resistance to heavy metals. This paper introduced the change of content and element of organic acids,including oxalic acid,malic acid,citric acid,tartaric acid,succinic acid,lactic acid and acetic acid and so on,and clarified the mechanism how to increase the resistance to heavy metal stress in plants and roots secretion grown in soil with cadmium,lead,aluminum,zinc and copper pollutions,at last,put forward the research direction of organic acid detoxification in plants under heavy metal stress.

关 键 词：有机酸 重金属胁迫 抗逆性 

分 类 号：X53[环境科学与工程—环境工程]