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Effects of heavy metals on bacterial community structure in the rhizosphere of Salsola collina and bulk soil in the Jinchuan mining area
Geomicrobiology Journal ( IF 2.3 ) Pub Date : 2021-05-19 , DOI: 10.1080/01490451.2021.1914784
Tian-Peng Gao 1, 2 , Zi-Dong Wan 3 , Xiao-Xiao Liu 1 , Jing-Wen Fu 3 , Guo-Hua Chang 2 , Hai-Li Sun 2 , Hai-Juan Li 1 , Yuan-Yuan Shen 1 , Yu-Bing Liu 4 , Xiang-Wen Fang 5
Affiliation  

Abstract

It is important to understand the changes in microbial properties of plant rhizospheres to elucidate the interaction between heavy metals and plant communities. In this study, high throughput sequencing method was used to analyze the effects of heavy metals on rhizosphere microbial community structure of the autochthonous plant Salsola collina in the Jinchuan mining area. The operational taxonomic units (OTU) number and species diversity, and richness of the bacterial community in the rhizosphere of Salsola collina were higher than those of the bulk soil. Proteobacteria, Actinobacteria, and Firmicutes were the major bacterial phyla, and Salsola collina, Kaistobacter, Citrobacter, Acinetobacter and Pseudomonas were the main genera. Principal component analysis (PCA) and unweighted pair group method using arithmetic average (UPGMA) cluster analysis showed that there were significant differences in bacterial community structure between site and between rhizosphere and bulk soil. The moisture content, total nitrogen, phosphorus, magnesium, nickel, chromium, lead, and zinc contents, and pH had significant effects on species richness of the bacterial community, with total phosphorus content having a significant effect on species diversity. The finding of this study could be used as an important guideline for bioremediation of heavy metals in mining area.



中文翻译:

重金属对金川矿区大蠊根际及大块土壤细菌群落结构的影响

摘要

了解植物根际微生物特性的变化对阐明重金属与植物群落之间的相互作用非常重要。本研究采用高通量测序方法分析重金属对金川矿区土生植物Salsola collina根际微生物群落结构的影响。Salsola collina根际细菌群落的操作分类单元(OTU)数量和物种多样性以及丰富度均高于大块土壤。Proteobacteria、Actinobacteria 和 Firmicutes 是主要的细菌门,而Salsola collinaKaistobacter、CitrobacterAcinetobacter假单胞菌属为主要属。主成分分析(PCA)和使用算术平均(UPGMA)聚类分析的未加权对组方法表明,立地之间以及根际和大块土壤之间的细菌群落结构存在显着差异。水分含量、总氮、磷、镁、镍、铬、铅、锌含量和pH值对细菌群落的物种丰富度有显着影响,总磷含量对物种多样性有显着影响。本研究结果可作为矿区重金属生物修复的重要指导方针。

更新日期:2021-07-14
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