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<p>Heavy metal pollution poses a significant environmental threat due to the non-degradable nature and toxicity of these pollutants. On the one hand, some metals are essential for plant growth (Fe, Mn, Zn, Cu, Mo). On the other hand, with increasing metal concentrations, growth and photosynthesis are inhibited, oxidative stress increases, and genotoxic effects occur. Microbial-enhanced phytoremediation is an approach that offers a sustainable, eco-friendly, and cost-effective solution for the remediation of soils contaminated with heavy metals. This meta-analysis is the first to investigate the impact of microbially-assisted phytoremediation on heavy metal accumulation in plants, considering various microorganisms, plant species, and soil properties. A comprehensive search of the Scopus database identified 67 relevant studies published between 1993 and 2023. Comprehensive Meta Analysis 3.0 software was used to calculate the effect size of the data. On average, microorganisms increase the accumulation of heavy metals in plant roots and shoots. Arbuscular mycorrhizal fungi tend to induce phytostabilization by preventing the translocation of heavy metals from roots to shoots. In contrast, bacteria and non-arbuscular mycorrhizal fungi generally enhance the accumulation of heavy metals in all parts of plants. Several genera, such as <i>Arthrobacter</i>, <i>Bacillus</i> and <i>Trichoderma</i>, show high potential for promoting the uptake of metals in plants. <i>Mucor</i> shows promise in reducing heavy metal accumulation or promoting phytostabilization. These findings highlight the complex interactions between plants and microorganisms in heavy metal contaminated soils and provide valuable insights for optimizing phytoremediation strategies.</p>

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A Global Meta-Analysis on Microbially-Assisted Phytoremediation of Heavy Metals in Contaminated Soils

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Fedor D. Ivanov,
  • Elizaveta P. Pulikova,
  • Andrey V. Gorovtsov,
  • Tatiana M. Minkina,
  • Chetan Keswani

摘要

Heavy metal pollution poses a significant environmental threat due to the non-degradable nature and toxicity of these pollutants. On the one hand, some metals are essential for plant growth (Fe, Mn, Zn, Cu, Mo). On the other hand, with increasing metal concentrations, growth and photosynthesis are inhibited, oxidative stress increases, and genotoxic effects occur. Microbial-enhanced phytoremediation is an approach that offers a sustainable, eco-friendly, and cost-effective solution for the remediation of soils contaminated with heavy metals. This meta-analysis is the first to investigate the impact of microbially-assisted phytoremediation on heavy metal accumulation in plants, considering various microorganisms, plant species, and soil properties. A comprehensive search of the Scopus database identified 67 relevant studies published between 1993 and 2023. Comprehensive Meta Analysis 3.0 software was used to calculate the effect size of the data. On average, microorganisms increase the accumulation of heavy metals in plant roots and shoots. Arbuscular mycorrhizal fungi tend to induce phytostabilization by preventing the translocation of heavy metals from roots to shoots. In contrast, bacteria and non-arbuscular mycorrhizal fungi generally enhance the accumulation of heavy metals in all parts of plants. Several genera, such as Arthrobacter, Bacillus and Trichoderma, show high potential for promoting the uptake of metals in plants. Mucor shows promise in reducing heavy metal accumulation or promoting phytostabilization. These findings highlight the complex interactions between plants and microorganisms in heavy metal contaminated soils and provide valuable insights for optimizing phytoremediation strategies.