Characteristics of Fungal Community Structure in Soils with Continuous Cropping Obstacles of Pepper
Continuous cropping obstacle is currently an important problem restricting the sustainable development of the pepper industry in China.Analyzing the microbial interactions between healthy soils and soils with soil-borne diseases can provide theoretical support for alleviating the continuous cropping obstacle of peppers.In this paper,healthy and diseased soils of peppers grown continuously for many years were studied.The fungal communities in healthy and diseased soils of peppers were characterized using ITS high-throughput sequencing.The core keystone species for healthy soils were further explored through correlation analysis and random forest model construction.The results showed that the pathogenic soils was characterized by an increased diversity of pathogenic fungal species,with Neocosmospora and Fusarium being the main biological factors responsible for pepper disease.A random forest analysis of core microorganisms in healthy soils correlated with morbidity and pathogens revealed the ability of Thielavia and Papulaspora to suppress pathogen population abundance and pepper morbidity.These results provided theoretical and technical supports for the resolution of continuous crop obstacle in pepper cultivation.