Effects of cadmium contamination on bacterial and fungal communities in Panax ginseng-growing soil

文献类型： 外文期刊

第一作者： Sun, Hai

作者： Sun, Hai;Shao, Cai;Jin, Qiao;Li, Meijia;Zhang, Zhenghai;Liang, Hao;Lei, Huixia;Qian, Jiaqi;Zhang, Yayu;Sun, Hai;Shao, Cai;Jin, Qiao;Li, Meijia;Zhang, Zhenghai;Lei, Huixia;Qian, Jiaqi;Zhang, Yayu;Liang, Hao;Zhang, Yayu

作者机构：

关键词： Panax ginseng; Cadmium contamination; Microbial community; HiSeq sequencing

期刊名称：BMC MICROBIOLOGY （ 影响因子：4.465； 五年影响因子：4.818 ）

ISSN： 1471-2180

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Cadmium (Cd) contamination in soil poses a serious safety risk for the development of medicine and food with ginseng as the raw material. Microorganisms are key players in the functioning and service of soil ecosystems, but the effects of Cd-contaminated ginseng growth on these microorganisms is still poorly understood. To study this hypothesis, we evaluated the effects of microorganisms and Cd (0, 0.25, 0.5, 1.0, 2.0, 5.0, and 10.0 mg kg(-1) of Cd) exposure on the soil microbial community using Illumina HiSeq high-throughput sequencing. Results Our results indicated that Cd-contaminated soil affected the soil microbial diversity and composition, and bacterial diversity was affected more than fungal diversity in Cd-contaminated soil, especially according to Shannon indices. The abundance of the soil microbial community decreased and the composition changed according to the relative abundances at the phylum level, including those of Saccharibacteria and Gemmatimonadetes in bacteria and Mortierellomycota in fungi. The LEfSe algorithm was used to identify active biomarkers, and 45 differentially abundant bacterial taxonomic clades and 16 differentially abundant fungal taxonomic clades were identified with LDA scores higher than 4.0. Finally, a heatmap of Spearman's rank correlation coefficients and canonical discriminant analysis (CDA) indicated that some key biomarkers, Arenimonas, Xanthomonadales, Nitrosomonadaceae, Methylophilales, Caulobacterales, Aeromicrobium, Chitinophagaceae, Acidimicrobiales, Nocardioidaceae, Propionibacteriales, Frankiales, and Gemmatimonadaceae, were positively correlated with the total and available Cd (p<0.05) but negatively correlated with AK, AP, and pH (p<0.05) in the bacterial community. Similarly, in the fungal community, Tubaria, Mortierellaceae, and Rhizophagus were positively correlated with the total and available Cd but negatively correlated with AK, AP, TK, and pH. Conclusion Cd contamination significantly affected microbial diversity and composition in ginseng-growing soil. Our findings provide new insight into the effects of Cd contamination on the microbial communities in ginseng-growing soil.

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