Occurrence, fate, and transport of potentially toxic metals (PTMs) in an alkaline rhizosphere soil-plant (Maize, Zea mays L.) system: the role of Bacillus subtilis
Occurrence, fate, and transport of potentially toxic metals (PTMs) in an alkaline rhizosphere soil-plant (Maize, Zea mays L.) system: the role of Bacillus subtilis
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碱性根际土壤-植物（玉米、玉米）系统中潜在有毒金属 (PTM) 的出现、归宿和运输：枯草芽孢杆菌的作用
DOI：
10.1007/s11356-018-4031-6
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发表时间：
2019
影响因子：
5.8
通讯作者：
Mielke Howard W
中科院分区：
文献类型：
--
作者：
Li Xiaoping;Cai Yue;Liu Dongying;Ai Yuwei;Zhang Meng;Gao Yu;Zhang Yuchao;Zhang Xu;Yan Xiangyang;Liu Bin;Yu Hongtao;Mielke Howard W
利用微生物是修复土壤中潜在有毒金属（PTMs）最有前途的方法之一。本研究通过盆栽试验，系统研究了枯草芽孢杆菌对玉米根际土壤PTMs发生、分异、转运和积累的影响。枯草芽孢杆菌对土壤中Pb、Sb、Ni、Zn、Cu和Cr的命运和流动性有明显的影响，并影响玉米根际土壤中PTMs的分布、玉米生长和微生物群落结构。结果表明，锌在玉米根系中的积累比其他PTMs更容易。化学分馏表明，枯草芽孢杆菌具有固定根际土壤中Pb、Sb、Ni、Zn和Cu的倾向。与其他PTMs相比，Cr的可利用性更强，流动性更强，对生态环境的健康风险更高。这些结果表明，枯草芽孢杆菌可以作为一种地球微生物稳定剂，固定碱性土壤中的PTMs (Pb、Sb、Ni、Cu、Zn)，减少植物对它们的吸收，从而降低它们进入食物链的潜在风险。
Utilization of microbes is one of the most promising methods to remediate potentially toxic metals (PTMs) from soil. In this study, a systematic investigation was conducted to study the influence of Bacillus subtilis on PTMs occurrence, fractionation, translocation, and accumulation in the rhizosphere soil of Maize (Zea mays L.) in pot experiments. B. subtilis showed strong effects on the fate and mobility of Pb, Sb, Ni, Zn, Cu, and Cr, and it also affected PTMs' distribution in the rhizosphere soil, maize growth, and microbial community structure. Results showed that it was easier for Zn to accumulate in maize roots than other PTMs. According to chemical fractionation, B. subtilis tended to immobilize Pb, Sb, Ni, Zn, and Cu in the rhizosphere soil. Compared with other PTMs, Cr tended to be more available and more mobile, which indicated a higher health risk to the eco-environment. These findings suggested that B. subtilis could be used as a geomicrobiological stabilizer to immobilize PTMs (Pb, Sb, Ni, Cu, Zn) in alkaline soils and decrease their uptake by plants, thus reducing the risks of a potential transfer into the food chain.