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The cadA Gene in Cadmium-Resistant Bacteria from Cadmium-Polluted Soil in the Zhangshi Area of Northeast China

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Abstract

Cadmium-resistant bacteria were isolated from the farmland soil in Zhangshi Irrigation Area in Shenyang of Northeast China, an area has been polluted by heavy metals, especially cadmium, for more than 40 years. The cadA gene was detected in 4 Bacillus strains and for the first time in one Flavobacterium strain. The high sequence identity (93%–99%) of cadA gene, shared indels in different bacterial species and genera, and the phylogenetic incongruence between 16S rDNA gene tree and cadA gene tree suggested that lateral gene transfer (LGT) occurred among Bacillus and Flavobacterium spp. The LGT of cadA gene might play a vital role in promoting the spread of cadmium-resistant phenotypes throughout soil microbial communities.

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Acknowledgment

This work was supported by the National Key Basic Research Program of China (no. 2004CB418503)

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Authors and Affiliations

  1. Department of Microbial Resources & Ecology, Institute of Applied Ecology, Chinese Academy of Science, No. 72 Wenhua Road, Shenyang, 110016, China

    Yan Zhang, Huiwen Zhang, Xinyu Li, Zhencheng Su & Chenggang Zhang

  2. Graduate School of the Chinese Academy of Science, No. 19 Yuquan Road, Beijing, 100039, China

    Yan Zhang

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  1. Yan Zhang
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  2. Huiwen Zhang
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  3. Xinyu Li
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  4. Zhencheng Su
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Correspondence to Yan Zhang.

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Zhang, Y., Zhang, H., Li, X. et al. The cadA Gene in Cadmium-Resistant Bacteria from Cadmium-Polluted Soil in the Zhangshi Area of Northeast China. Curr Microbiol 56, 236–239 (2008). https://doi.org/10.1007/s00284-007-9064-x

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  • DOI: https://doi.org/10.1007/s00284-007-9064-x

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