The effects and interrelationships of intercropping on Cotton Verticillium wilt and soil microbial communities

作者：Yun Zhang, Yuanxue Yang, Xiuyun Lu, Aiyu Wang, Chao Xue, Ming Zhao, Jianhua Zhang · 发表于：BMC Microbiology · 年份：2023 · DOI：10.1186/s12866-023-02780-6 · 被引用次数：33 · 研究领域：Agronomic Practices and Intercropping Systems、Plant-Microbe Interactions and Immunity、Soil Carbon and Nitrogen Dynamics

BACKGROUND: Cotton Verticillium wilt, causing by Verticillium dahliae, has seriously affected the yield and quality of cotton. The incidence of Verticillium wilt in cotton fields has been on the rise for many years, especially after straw has been returned to the fields. Intercropping can reduce the incidence of soil borne diseases and is often used to control crop diseases, but the relationship between the effects of intercropping on microbial communities and the occurrence of plant diseases is unclear. This research explored the relationship between soil microbial community structure and Cotton Verticillium wilt in interplanting of cotton-onion, cotton-garlic, cotton-wheat and cotton monocultures. Amplicon sequencing applied to the profile of bacterial and fungal communities. RESULTS: The results showed that the disease index of Cotton Verticillium wilt was significantly reduced after intercropping with cotton-garlic and cotton-onion. Chao1 and Sobs indices were not significantly different in the rhizosphere soil and pre-plant soils of the four planting patterns, but the pre-plant fungal shannon index was significantly lower in the cotton-onion intercropping plot than in the other three plots. PCoA analysis showed that the soil microbial communities changed to a certain extent after intercropping, with large differences in the microbial communities under different cropping patterns. The abundance of Chaetomium was highest in the cotton-garlic intercropping before planting; ...