Application of ABCB1 in symbiosis of plants and mycorrhiza

The invention relates to an ABCB1 gene and application thereof in mycorrhizal symbiosis. It is found for the first time that ABCB1 specificity mediates outward transport of auxin to the periarbuscular membrane, and mycorrhizal fungus branching is promoted. Based on the ABCB1 function and genetic engineering technology, the number of plant mycorrhiza colonization can be increased, symbiosis of plants and mycorrhizal fungi can be finely regulated and controlled, and plants are promoted to efficiently obtain nutrient elements such as phosphorus and nitrogen from soil. 本发明涉及ABCB1基因及其在菌根共生上的应用。本发明首次发现ABCB1特异性介导植物生长素外运到丛枝周膜，促进菌根真菌分支。基于ABCB1的功能和基因工程技术，可以提高植物菌根定殖的数目，精细调控植物与菌根真菌共生，促进植物高效从土壤中获取磷、氮等营养元素。