东南景天Sedum alfredii修复重金属污染土壤的研究进展

Research progress on using Sedum alfredii for remediation of heavy metal-contaminated soil

植物修复是净化重金属污染土壤最有潜力的原位修复技术之一,因地制宜地选择植物修复材料是大田植物修复成功实施的关键。国内外已发现的众多重金属超积累植物具有不同的生理特性,其中东南景天Sedum alfredii可忍耐和富集镉(Cd)和锌(Zn)等多种重金属,并且具有生长迅速的特点,是研究植物修复技术的模式植物之一。综述了东南景天对重金属的耐性、吸收、转运及解毒机制,阐明东南景天研究过程中存在的问题,并对其研究前景和方向作了简要分析,为重金属污染土壤植物修复工作的深入开展提供参考。

Phytoremediation is an in situ potential strategy for cleanup of soil contaminated by heavy metals. Proper selection of plant materials is a key to successful phytoremediation in the field. A number of identified hyperaccumulators possess different physiological characteristics. Sedum alfredii plants typically have high heavy metal(e.g. Zn and Cd) accumulation capacity with fast growth rate as well. This paper reviewed the mechanisms of tolerance, absorption, transport and detoxification to heavy metals of this plant species, pointed out the existing problems in its research and finally made prospects of Sedum alfredii study, aiming to provide some references for better remediation of heavy metal contaminated soil in the future. [Ch, 56 ref.]