Lin Jiahui, Dai Zhongmin, Lei Mei, Qi Qian, Zhou Weijun, Ma Lena Q, Dahlgren Randy A, Xu Jianming
Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.
Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.
ISME Commun. 2024 Dec 27;5(1):ycae172. doi: 10.1093/ismeco/ycae172. eCollection 2025 Jan.
, renowned for its ability to hyperaccumulate arsenic, presents a promising solution to the escalating issue of global soil arsenic contamination. This fern cultivates a unique underground microbial community to enhance its environmental adaptability. However, our understanding of the assembly process and the long-term ecological impacts of this community remains limited, hindering the development of effective soil remediation strategies. This study addresses this gap by investigating soil-root habitats from three geographically diverse fields comprising a gradient of arsenic contamination, complemented by a time-scale greenhouse experiment. Field investigations reveal that arsenic stress influences community assembly dynamics in the rhizosphere by enhancing processes of homogeneous selection. Greenhouse experiments further reveal that arsenic exposure alters the assembly trajectory of rhizosphere communities by promoting key microbial modules. Specifically, arsenic exposure increases the enrichment of a core taxon (i.e. ) in the rhizosphere, both in field and greenhouse settings, boosting their abundance from undetectable levels to 0.02% in the soil after phytoremediation. Notably, arsenic exposure also promotes a pathogenic group (i.e. ) in the rhizosphere, increasing their abundance from undetectable levels to 0.1% in the greenhouse. This raise concerns that warrant further investigation in future phytoremediation studies. Overall, this study elucidates the assembly dynamics of the soil microbiome following the introduction of a remediation plant and emphasizes the often-overlooked impacts on soil microbial community following phytoremediation. By probing the ecological impacts of remediation plants, this work advances a more nuanced understanding of the complex ecological implications inherent in phytoremediation processes.
以其超积累砷的能力而闻名，为全球土壤砷污染不断升级的问题提供了一个有前景的解决方案。这种蕨类植物培育了独特的地下微生物群落以增强其环境适应性。然而，我们对这个群落的组装过程和长期生态影响的理解仍然有限，这阻碍了有效的土壤修复策略的发展。本研究通过调查来自三个地理上不同的、具有砷污染梯度的田地的土壤 - 根系栖息地，并辅以时间尺度的温室实验，来填补这一空白。实地调查表明，砷胁迫通过增强同质选择过程影响根际群落组装动态。温室实验进一步表明，砷暴露通过促进关键微生物模块改变根际群落的组装轨迹。具体而言，在田间和温室环境中，砷暴露都增加了根际中一个核心分类群（即 ）的富集，将其丰度从不可检测水平提高到植物修复后土壤中的0.02%。值得注意的是，砷暴露还促进了根际中的一个致病菌群（即 ），使其丰度在温室中从不可检测水平增加到0.1%。这引发了一些担忧，值得在未来的植物修复研究中进一步调查。总体而言，本研究阐明了引入修复植物后土壤微生物组的组装动态，并强调了植物修复后对土壤微生物群落常常被忽视的影响。通过探究修复植物的生态影响，这项工作推进了对植物修复过程中固有复杂生态影响的更细致入微的理解。
