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Effects of different crop rotations on the incidence of cotton Verticillium wilt and structure and function of the rhizospheric microbial community

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Abstract

Aims

Cotton continuous cropping might cause the soil-borne disease Verticillium wilt in agricultural production. Crop rotation has been shown to be an effective method for controlling this disease. The objectives of this study were to evaluate the effects of cotton-maize rotation (CMR) and cotton-maize-broccoli residues rotation (CMBR) on incidence of cotton Verticillium wilt (CVW), soil microbial community structure and function.

Methods

qPCR was used to determine the populations of V. dahliae. Soil microbial community structure and function was analysed using metagenomics analysis.

Results

Results demonstrated that the disease incidence significantly decreased by 87.19% and 98.93%, and the populations of V. dahliae decreased by 67.07% and 84.36% under the CMR and CMBR treatments, respectively. There were significantly differences in bacterial communities under the CMR and CMBR treatments. Redundancy analysis revealed that the structures of microbial communities were mainly driven by available potassium (AK) and pH. Spearman’s correlation analysis showed that most of KEGG pathways in bacterial community were negatively with pH, positively with NH4+-N and AK. The abundances of NifH, AmoA, NirK, and NarG genes (involved in nitrogen cycling), PfkABC, FbaB, PGAM and KdpgA genes (carbon cycling), and Sir, Sat, and CysND (sulfur cycling) were enriched by the CMR and CMBR treatments.

Conclusions

CMR and CMBR could change the bacterial community structure and nutrients cycling in cotton rhizosphere, decrease the populations of V. dahliae in soil, therefore significantly reduce the incidence of CVW.

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Data availability

All raw sequences have been deposited at the National Center for Biotechnology Information (NCBI) under accession number PRJNA732914.

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Acknowledgments

This work was supported by the China Agriculture Research System of MOF and MARA (CARS-15-19), the National Key Research and Development Program of China (2017YFD0200601), and the Special Fund for Agro-Scientific Research in the Public Interest (201503109).

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Authors and Affiliations

Authors

Contributions

WZ, QG, SL, and PM planned, designed the research, and experiments. WZ, PW, LD, XZ, ZS, and XL performed the experiments. WZ and PM analyzed the data and wrote the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Qinggang Guo or Ping Ma.

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Conflicts of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Responsible Editor: Sven Marhan.

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Zhao, W., Li, S., Dong, L. et al. Effects of different crop rotations on the incidence of cotton Verticillium wilt and structure and function of the rhizospheric microbial community. Plant Soil 485, 457–474 (2023). https://doi.org/10.1007/s11104-022-05842-2

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  • DOI: https://doi.org/10.1007/s11104-022-05842-2

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