Research Progress on the Root Exudate-mediated Mechanism of Intercropping for Prevention and Control of Soil-borne Diseases

The prevention and control of soil-borne diseases and the alleviation of obstacles to continuous cropping play a significant role in developing healthy soil and realizing the green and sustainable development of agriculture in China. Reasonable intercropping may contribute to the growth of crop yield and resource utilization efficiency, as well as the effective prevention and control of soil-borne diseases, thereby highlighting the significance of root exudates’ contribution for the prevention and control of soil-borne diseases. In order to provide references for the prevention and control of soil-borne diseases via intercropping, this study focused on soil-borne diseases caused by plant pathogens, and expounded the effect of intercropping on plant root exudates. To comprehensively analyze the root exudate-mediated mechanism of reasonable intercropping for prevention and control of soil-borne diseases, the synergistic effects of root exudates of host plants and non-host plants for soil-borne pathogens, the direct inhibition of key bacteriostatic substances in root exudates of non-host plants for soil-borne pathogens on the pathogenic bacteria in host plants, and the creation of rhizosphere microbial communities by intercropping host/non-host plants for soil-borne pathogens through root exudates were discussed.