无机砷在植物和微生物体内的代谢机制研究进展

砷污染是全球的热点问题之一.土壤中的无机砷在植物中的积累可通过食物链传递,从而对人体健康构成严重威胁.了解微生物和植物对无机砷的代谢机制,对认识和控制土壤中砷的风险至关重要.近年来,微生物对无机砷的代谢机制研究已经比较深入,但是仍有一些问题亟待解决,如信号传导、抗砷基因筛选等.在植物对无机砷的摄取、还原机制等方面也取得了一定进展,但是植物体内砷的转运机制、排出机制等仍有待进一步研究.论文综述了微生物、植物体内无机砷的代谢过程中,砷摄取、转运、还原和排出机制的最新进展,并对今后的研究方向进行了展望.

Recent Developments in Mechanisms of Arsenic Metabolism in Plants and Microbe

Arsenic contamination has become a major environmental issue all around the world. Arsenic in soil can be taken up by plants and then transferred into human beings through food chain. It is essential to know how arsenic is taken up by and how it metabolized in plants and microbe. Although in recent years, great progress have been achieved in understanding the metabolism of arsenic in microbe, many questions remain to be investigated, such as signal transduction, anti-arsenic gene screening. Rapid advancement also has been accomplished in understanding the uptake and reduction of arsenic in plants. Further studies should be concentrated on the mechanism of arsenic transport and efflux. Current work on the uptake, reduction, translocation and efflux of arsenic in plants and microbe are reviewed in this paper. Future research directions in this field are also recommended.