Bacterial wilt alters the microbial community characteristics of tobacco root and rhizosphere soil

The root-related microorganisms have good effects of stress resistance and disease resistance, and promote the healthy growth of plants. It is important to understand the characteristics of microbial communities in healthy and infected tobacco roots and rhizosphere soil for controlling tobacco bacterial wilt by using beneficial microorganisms in specific niches. In this study, the soil properties and microbial composition of the rhizosphere soil and roots of healthy and bacterial wilt-diseased tobacco plants were analyzed to evaluate their potential influence on plant health. Soil properties including total carbon and total nitrogen have show significant differences in bacterial wilt-infected tobacco. The microbial community diversity and composition are high related to the occurrence of bacterial wilt. Fungal, bacterial and actinobacterial community varied between two different health systems with the increase/decrease of beneficial microbiomes. Results of community functions of rhizosphere microbiomes have showed the differences in Metabolic pathways. This study clarified the impact of bacterial wilt caused by Ralstonia solanacearum on tobacco root and rhizosphere soil microbial communities, providing a theoretical basis for studying the relationship between rhizosphere-soil microorganisms-plant health, and offering a new perspective for utilizing beneficial microorganisms to defend against pathogen invasion in specific ecological niches.