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转化和功能性微生物的空间变化在米根球微区与硫基被动器的米根球微区

Lina Zou¹, Shu Zhang², Luyao Li³

¹Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou 311251, China.

Journal of hazardous materials

|October 24, 2025

概括

基于硫的消极剂通过改变土壤化学和根球中的微生物活动来减少大米中的. 这项研究揭示了这些修正案是如何固定的,从而提高了大米的安全性和土壤修复策略.

科学领域:

环境科学环境科学
土壤科学土壤科学
微生物学微生物学

背景情况:

米的 (As) 吸收受到其化学形式 (种类) 的严重影响.
根区 (树层) 的生物地质化学控制了As的物种化和生物可用性.
修正案对亚转化和根系球中的微生物群落的影响尚不清楚.

研究的目的:

研究大米根球中的物种化和微生物群落的空间异质性.
评估基于硫的被动器在固定As的有效性.
为了阐明由根球过程介导的As固定的机制.

主要方法:

利用树根箱系统研究大米植物及其树根球.
在土壤中应用硫基受体剂,并分析了As的物种化 (总的As,As,III,As,V) 和植物中的积累.
量化微生物功能基因 (例如,dsrA,Geobacter) 和识别了根球微区内的微生物社区.

主要成果:

化器的应用显著降低了土壤孔水中的As度,以及大米植物的As吸收.
观察到硫酸盐减少基因 (dsrA) 和特定微生物群体 (Clostridium,Bacillus,Geobacter) 的丰度增加.
空间分析显示,A的移动性取决于距离,在根至近位区域 (0-2毫米) 微生物活动峰值和A封存.

结论:

基于硫的被动剂增强了根球效应,通过硫-铁相互作用和硫酸盐-铁减少促进了As固定.
在As分化和微生物功能中的树叶球异质性是有效As修复的关键.
这些发现推动了在水种植中处理As污染的现场战略.

关键词:

亚是一种.功能性基因是一种功能性基因.整治整治整治整治赖索斯菲尔微区是一个微区.空间变化的空间变化.

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