Considerable amounts of heavy metals have contaminated the soil from potential manmade point and non-point sources such as industry, urbanisation and agriculture. In both managed and natural ecosystems, beneficial plant–microbe interactions play a significant role improving the growth and health of plants, and could be applied for improving soil fertility as well as crop productivity. Additionally, plant–microbe interactions could be utilised in bioremediation of heavy metal-contaminated soils. The efficiency of phytoremediation can be improved with the aid of plant-growth-promoting bacteria (PGPB), which can change metals to bioavailable and soluble forms. PGPB perform remediation through processes such as production of siderophores, organic acids and biosurfactants, biomethylation, redox processes, phosphorus solubilisation, nitrogen fixation and iron sequestration. These processes improve plant growth and increase plant biomass along with phytoremediation. A crucial solution to the problem of heavy metal contamination might be an appropriate understanding of hyperaccumulator plants and their interaction with microbes. Emerging strategies for either enhancing or reducing the bioavailability of heavy metals in the rhizosphere, such as improving plant establishment, growth and health can significantly accelerate the heavy metal bioremediation process. In this review, we feature the function of PGPB to assist phytoremediation of heavy metals as an eco-friendly and economical approach.

大量重金属污染了土壤，这些重金属来自潜在的人为点和非点源，如工业、城市化和农业。在管理和自然生态系统中，有益的植物-微生物相互作用在改善植物的生长和健康方面发挥着重要作用，可用于提高土壤肥力和作物生产力。此外，植物-微生物相互作用可用于重金属污染土壤的生物修复。植物修复的效率可以在植物生长促进细菌 (PGPB) 的帮助下提高，PGPB 可以将金属转变为生物可利用和可溶的形式。PGPB 通过诸如生产铁载体、有机酸和生物表面活性剂、生物甲基化、氧化还原过程、磷溶解、固氮和固铁。这些过程可促进植物生长并增加植物生物量以及植物修复。重金属污染问题的一个关键解决方案可能是适当了解超富集植物及其与微生物的相互作用。提高或降低根际重金属生物利用度的新兴策略，例如改善植物的建立、生长和健康，可以显着加速重金属生物修复过程。在这篇综述中，我们将 PGPB 的功能作为一种生态友好和经济的方法来协助重金属植物修复。重金属污染问题的一个关键解决方案可能是适当了解超富集植物及其与微生物的相互作用。提高或降低根际重金属生物利用度的新兴策略，例如改善植物的建立、生长和健康，可以显着加速重金属生物修复过程。在这篇综述中，我们将 PGPB 的功能作为一种生态友好和经济的方法来协助重金属植物修复。重金属污染问题的一个关键解决方案可能是适当了解超富集植物及其与微生物的相互作用。提高或降低根际重金属生物利用度的新兴策略，例如改善植物的建立、生长和健康，可以显着加速重金属生物修复过程。在这篇综述中，我们将 PGPB 的功能作为一种生态友好和经济的方法来协助重金属植物修复。