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The chirality of imazethapyr herbicide selectively affects the bacterial community in soybean field soil

Environmental Science and Pollution Research volume 26, pages 2531–2546 (2019)Cite this article

Abstract

The chiral herbicide imazethapyr (IM) is frequently used to control weeds in soybean fields in northeast China. However, the impact of IM enantiomers on microbial communities in soil is still unknown. Genetic markers (16S rRNA V3-V4 regions) were used to characterize and evaluate the variation of the bacterial communities potentially effected by IM enantiomers. Globally, the bacterial community structure based on the OTU profiles in (−)-R-IM-treated soils was significantly different from those in (+)-S-IM-treated soils, and the differences were enlarged with the treatment dose increasing. Interestingly, the Rhizobiaceae family and several other beneficial bacteria, including Bradyrhizobium, Methylobacterium, and Paenibacillus, were strongly enriched in (−)-R-IM treatment compared to (+)-S-IM treatment. In contrast, the pathogenic bacteria, including Erwinia, Pseudomonas, Burkholderia, Streptomyces, and Agrobacterium, were suppressed in the presence of (−)-R-IM compared to (+)-S-IM. Furthermore, we also observed that the bacterial community structure in (−)-R-IM-treated soils was more quickly restored to its original state compared with those in (+)-S-IM-treated soils. These findings unveil a new role of chiral herbicide in the development of soil microbial ecology and provide theoretical support for the application of low-persistence, high-efficiency, and eco-friendly optical rotatory (−)-R-IM.

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Funding

This research was funded by the Natural Science Foundation of China (NSFC, No. 41071314).

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Authors and Affiliations

  1. Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou, 310058, China

    Hao Wu, Hongshan Chen, Chongwei Jin & Yongsong Zhang

  2. Department of Agricultural Sciences, La Trobe University, Bundoora, Melbourne, VIC, 3086, Australia

    Caixian Tang

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  1. Hao Wu
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  2. Hongshan Chen
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  3. Chongwei Jin
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Wu, H., Chen, H., Jin, C. et al. The chirality of imazethapyr herbicide selectively affects the bacterial community in soybean field soil. Environ Sci Pollut Res 26, 2531–2546 (2019). https://doi.org/10.1007/s11356-018-3736-x

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Keywords

  • Imazethapyr
  • Enantiomer
  • 16s rRNA
  • Bacterial community structure
  • Phytopathogen
  • Beneficial bacteria