菌根真菌重金属耐性机制研究进展

Underlying Mechanisms of the Heavy Metal Tolerance of Mycorrhizal Fungi

菌根真菌在自然界中广泛存在,能与大多数陆地植物形成共生体,菌根共生体系对于植物适应各种逆境胁迫具有重要意义.在重金属污染土壤中通常也能发现菌根真菌,某些菌根真菌对重金属表现出较强的耐受性,在污染土壤修复方面显示出应用潜力.本文从生境选择、生理适应、功能基因表达调控等层面综述了菌根真菌重金属耐性机制方面的最新研究进展,并对今后的研究方向进行了展望,旨在推进相关机制研究及菌根技术在重金属污染土壤修复中的应用.

Mycorrhizal fungi are ubiquitous in natural ecosystems and can form symbiotic associations with the majority of terrestrial plants. They can be detected even in heavy metal-contaminated soils,while some fungal strains show strong heavy metal tolerance and could potentially be used in bioremediation of contaminated soils. We reviewed current research progresses in the underlying mechanisms of heavy metal tolerance of mycorrhizal fungi,with focuses on habitat selection,physiological adaptation and functional genes. Future research perspectives were proposed to promote the basic research and development of mycorrhizal technology for remediation of heavy metal-contaminated soils.