An Integrated Investigate of the Relationship Between the Soil Microbial Community and Chrysanthemum Zawadskii (Herb.) Wilt Disease

Abstract

Chrysanthemum wilt is a plant disease that exerts a substantial influence on the cultivation of Chrysanthemum zawadskii (Herb.) for tea and beverage production. The rhizobial microbial population exhibits a direct correlation with the overall health of the plants. Therefore, studying the rhizosphere of CZHZ microbial communities would be of great significance for finding methods to control this disease. This study collected rhizosphere soil samples from diseased and healthy strains and analysed their microbial composition using high-throughput sequencing technology. The results showed that the diversity of rhizosphere microorganisms in the diseased strains was considerably reduced, and the microbial community structure of the diseased strains underwent significant changes compared to the healthy strains. In addition, the relative abundance of pathogenic microorganisms, such as root rot fungi and phytophthora, significantly increased, while the beneficial micro-organisms (e.g. antagonistic bacteria and Actinomyces) decreased significantly in the rhizosphere soil of the diseased strains. The positive correlation between bacteria and environmental factors indicates that environmental factors may have a substantial impact on the abundance and species of fungi in soil. Our results show that we can prevent the occurrence of wilt disease by adjusting the physiochemical properties of the rhizosphere soil and by changing the microbial communities. However, by regulating and optimising the microbial community structure, new ideas and methods can be provided for the prevention and control of chrysanthemum wilt disease.