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Effects of continuous cropping on fungal community diversity and soil metabolites in soybean roots

Authors :
Dexin He
Xingdong Yao
Pengyu Zhang
Wenbo Liu
Junxia Huang
Hexiang Sun
Nan Wang
Xuejing Zhang
Haiying Wang
Huijun Zhang
Xue Ao
Futi Xie
Source :
Microbiology Spectrum, Vol 11, Iss 6 (2023)
Publication Year :
2023
Publisher :
American Society for Microbiology, 2023.

Abstract

ABSTRACT Microbial community imbalance is the main cause of soybean intercropping, but the mechanism of soybean soil fungal community diversity change induced by continuous cropping is still unclear. This study analyzes the fungal community diversity and the change of fungal communities in compartments of different root systems of intercropped soybeans by high-throughput sequencing (endosphere, rhizoplane, and rhizosphere) between continuous cropping and maize-soybean rotation. The results showed that the community composition and the diversity of compartments of different root systems of intercropped soybeans are different, and fungal diversities showed a decreasing trend from rhizosphere to endosphere. Continuous cropping significantly increased fungal community diversities in different root compartments and changed their formation, enrichment, and depletion processes. Continuous cropping brings about the enrichment of soil pathogens, but only partial soil pathogens could colonize from the rhizosphere to the endosphere. All these suggested that root compartments had selective effects on root-associated fungal community diversity. Additionally, metabolomics assay revealed that continuous cropping soybean markedly altered soil metabolic profiling. Correlation analysis results showed that fungal community diversity was significantly correlated with soil metabolites. To sum up, under different planting patterns, the diversity and the functional mode of soybean soil microbial community have changed. Continuous cropping has increased the abundance of pathogenic fungi in soybean soil, resulting in changes in the correlation between soil fungi and metabolites, and then changed the soil metabolic spectrum. IMPORTANCE Soybean yield can be affected by soybean soil fungal communities in different tillage patterns. Soybean is an important food crop with great significance worldwide. Continuous cultivation resulted in soil nutrient deficiencies, disordered metabolism of root exudates, fungal pathogen accumulation, and an altered microbial community, which brought a drop in soybean output. In this study, taking the soybean agroecosystem in northeast China, we revealed the microbial ecology and soil metabolites spectrum, especially the diversity and composition of soil fungi and the correlation of pathogenic fungi, and discussed the mechanisms and the measures of alleviating the obstacles.

Details

Language :
English
ISSN :
21650497
Volume :
11
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Microbiology Spectrum
Publication Type :
Academic Journal
Accession number :
edsdoj.6b8bcf73a3bc44bbb312bdf15595c60f
Document Type :
article
Full Text :
https://doi.org/10.1128/spectrum.01786-23