收稿日期: 2010-04-27
录用日期: 2010-07-05
网络出版日期: 2010-10-31
A review of progress in roles of organic acids on heavy metal resistance and detoxification in plants
Received date: 2010-04-27
Accepted date: 2010-07-05
Online published: 2010-10-31
傅晓萍, 豆长明, 胡少平, 陈新才, 施积炎, 陈英旭 . 有机酸在植物对重金属耐性和解毒机制中的作用[J]. 植物生态学报, 2010 , 34(11) : 1354 -1358 . DOI: 10.3773/j.issn.1005-264x.2010.11.013
Mechanisms of heavy metal tolerance and detoxification in plants can be divided into two categories, external exclusion and internal tolerance. We reviewed the effects of organic acids as a kind of metal chelators in both processes in plants. In the external detoxification process, organic acids excreted from plant roots may form stable metal-ligand complexes with heavy metal ions and change their mobility and bioavailability, thus preventing the metal ions entering plants or avoiding their accumulation in the sensitive sites of roots. In internal metal detoxification, organic acids may chelate with heavy metal in cytosol, where the ions can be transformed into a non-toxic or less toxic form.
Key words： detoxification; external exclusion; heavy metal; resistance; internal tolerance; organic acids
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