Research progress of arbuscular mycorrhizal fungi affecting plant diseases

Arbuscular mycorrhizal fungi (AMF) are important microorganisms in terrestrial ecosystems. They can form a symbiosis with most terrestrial plants in nature, bringing a variety of positive effects to the host plant, including improved plant resistance, particularly assisting plants to resist pathogen invasion. Based on the Web of Science database and CNKI China Academic Library, this paper summarizes the new progress of AM fungi affecting plant diseases and the research on AM fungi, other microorganisms, and environmental conditions; and other factors in synergy to improve plant disease resistance in the past two years. Moreover, it analyzes the mechanism of AM fungi affecting plant diseases, including the improvement of host plant nutritional status, nutrient activation around the root system, root morphology changes, competition with pathogens for infection sites and host photosynthesis products, rhizosphere microflora changes, and host defense mechanism activation. At the end of the paper, the anti-disease function of AM fungi community, the influence of AM fungi in the ecosystem, and the research on the influence of multiple factors on plant diseases are prospected.