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Purpose <p>In this study, the differences of heavy metal enrichment ability of different crops in heavy metals (HMs) contaminated soil and the analysis of microbial communities and functional characteristics in soil were investigated.</p> Method <p>The pollution risk of study area was assessed using the single pollution index (Pi) and the potential ecological risk index (RI), while soil physicochemical properties, microbial community structure, and functionality were analyzed. Health risks associated with HMs accumulation in crops were also evaluated.</p> Result <p>HMs concentrations in all study areas are generally high. Cropland 1 was identified as a considerable-risk zone, characterized by a high proportion of acid-soluble fraction Cd, Zn, and Mn in the soil. Crop analysis demonstrated significant HMs accumulation, with eggplant showing the strongly intake of Cd, potato and sunflower seeds of Cu. Health risk assessment indicated that the hazard index (HI) exceeded 1, while the total carcinogenic risk (TCR) Surpassed the 1× 10<sup>−4</sup> threshold. The microbial community was predominantly composed of oligotrophic and HMs-tolerant taxa, including <i>Acidobacteria</i>, <i>Chloroflexota</i>, and others. Resistant microorganisms, including <i>Salmonella typhimurium</i> (strain LT2/SGSC1412/ATCC 700720<i>), Escherichia coli</i> (strain K12) and others, were identified, suggesting microbial adaptation to HMs stress.</p> Conclusion <p>The findings underscore the severity of HM pollution and highlight the necessity for targeted remediation strategies. The study also reveals microbial adaptability to HM stress and the presence of antibiotic resistance genes, indicating that environmental and public health impacts must be taken into account during soil remediation efforts.&#xa0;</p> Graphical abstract <p></p>

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Unveiling the hidden threat: heavy metal accumulation in crops and soil microbial dynamics in a teaching experimental farmland

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Xue Gu,
  • Xuegang Yu,
  • Qing Li,
  • Yanjun Mao,
  • Zhiwei Zhou,
  • Huan Hu,
  • Rui Huang,
  • Jiayu Zhou,
  • Yuanyi Sun,
  • Yancheng Li,
  • Aijiang Yang

摘要

Purpose

In this study, the differences of heavy metal enrichment ability of different crops in heavy metals (HMs) contaminated soil and the analysis of microbial communities and functional characteristics in soil were investigated.

Method

The pollution risk of study area was assessed using the single pollution index (Pi) and the potential ecological risk index (RI), while soil physicochemical properties, microbial community structure, and functionality were analyzed. Health risks associated with HMs accumulation in crops were also evaluated.

Result

HMs concentrations in all study areas are generally high. Cropland 1 was identified as a considerable-risk zone, characterized by a high proportion of acid-soluble fraction Cd, Zn, and Mn in the soil. Crop analysis demonstrated significant HMs accumulation, with eggplant showing the strongly intake of Cd, potato and sunflower seeds of Cu. Health risk assessment indicated that the hazard index (HI) exceeded 1, while the total carcinogenic risk (TCR) Surpassed the 1× 10−4 threshold. The microbial community was predominantly composed of oligotrophic and HMs-tolerant taxa, including Acidobacteria, Chloroflexota, and others. Resistant microorganisms, including Salmonella typhimurium (strain LT2/SGSC1412/ATCC 700720), Escherichia coli (strain K12) and others, were identified, suggesting microbial adaptation to HMs stress.

Conclusion

The findings underscore the severity of HM pollution and highlight the necessity for targeted remediation strategies. The study also reveals microbial adaptability to HM stress and the presence of antibiotic resistance genes, indicating that environmental and public health impacts must be taken into account during soil remediation efforts. 

Graphical abstract