植物根际促生菌及丛枝菌根真菌协助植物修复重金属污染土壤的机制

发布时间：2018-09-05 13:56

【摘要】：植物修复是一种前景广阔的重金属污染土壤的主要修复技术,在微生物的协助下效果更为显著。植物根际促生菌可通过分泌吲哚-3-乙酸(IAA)、产铁载体、固氮溶磷等方式促进植物生长、改善植物重金属耐受性,从而有效提高重金属污染土壤的植物修复效率。菌根真菌是土壤-植物系统中重要的功能菌群之一,可侵染植物根系改变根系形态和矿质营养状况,通过菌丝体吸附重金属,也可产生球囊霉素、有机酸、植物生长素等次生代谢产物改变重金属生物有效性。植物根际促生菌与丛枝菌根真菌可对植物产生协同促生作用,在重金属污染土壤修复中具有一定应用潜力。目前,国内外关于植物根际促生菌和丛枝菌根真菌互作已有大量研究,而二者的相互作用机理仍处于探索阶段。本文综述了近年来国内外植物根际促生菌和丛枝菌根真菌在重金属污染土壤植物修复中的作用机制,并对其研究前景进行展望。
[Abstract]:Phytoremediation is one of the most promising remediation techniques for heavy metal contaminated soils. Plant rhizosphere promoting bacteria can promote plant growth by secreting indole-3-acetic acid (IAA), to produce iron carrier, nitrogen-fixing and dissolving phosphorus, so as to improve plant heavy metal tolerance, so as to improve the phytoremediation efficiency of heavy metal contaminated soil. Mycorrhizal fungi are one of the important functional flora in soil-plant system. They can infect plant roots to change root morphology and mineral nutrition, adsorb heavy metals through mycelium, and produce balloon mycin and organic acids. Secondary metabolites such as plant auxin change the bioavailability of heavy metals. Plant rhizosphere growth promoting bacteria and arbuscular mycorrhizal fungi can produce synergistic growth promoting effect on plants, which has a certain application potential in heavy metal contaminated soil remediation. At present, there have been a lot of studies on the interaction between rhizosphere probiotics and arbuscular mycorrhizal fungi at home and abroad, but the interaction mechanism between them is still in the exploration stage. In this paper, the mechanism of plant rhizosphere growth promoting bacteria and arbuscular mycorrhizal fungi in phytoremediation of heavy metal contaminated soil was reviewed, and its research prospect was prospected.
【作者单位】：中山大学环境科学与工程学院;广东省环境污染控制与修复技术重点实验室中山大学;
【基金】：环保公益性行业科研专项项目(No.201509037) 广东省自然科学基金项目(No.2015A030313159) 广东省科技计划项目(No.2016A020221012) 中央高校基本科研业务费项目(No.31650014) 国家自然科学基金项目(No.41671313)~~
【分类号】：X17;X53

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