A review of progress in roles of organic acids on heavy metal resistance and detoxification in plants

作者：FU Xiao-ping, Changming Dou, Shaoping Hu, Chen Xin-cai, Jiyan Shi, Yingxu Chen · 发表于：Chinese Journal of Plant Ecology · 年份：2010 · DOI：10.3773/j.issn.1005-264x.2010.11.013 · 被引用次数：9 · 研究领域：Aluminum toxicity and tolerance in plants and animals、Heavy metals in environment、Plant Stress Responses and Tolerance

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.