Research Progress of ABC Transporter in Regulating Plant Root Exudation Efflux
Rhizosphere microecological environment affects the growth and development of plants,and a good rhizosphere microecological environment is beneficial to plant growth.As an important component of rhizosphere microecological environment,root exudate was an important carrier for the communication between plants and rhizosphere environment.Plants can promote or inhibit the growth and reproduction of certain rhizosphere microorganisms by regulating the types and contents of root exudate,and change the structure and function of rhizosphere soil microbial community,further regulates rhizosphere microecological environment and influences plant growth and development.Traditionally,root exudates were considered to be transported to rhizosphere soil through passive pathways.With the deepening of research,it has been confirmed that roots can regulate the type and content of root exudates by active transport pathways involving transmembrane transporters.As the largest transporter family in the biological world,ABC(ATP-binding cassette transporter)transporters can participate in the transport of various compounds,such as lipids,phenolic acids,hormones and other substances,by utilizing the energy released by hydrolysis of ATP.ABC transporter plays an important role in mediating transmembrane transport of root exudates,influencing the species and abundance of rhizosphere microorganisms,and regulating rhizosphere microecological environment.In this paper,the types of root exudates were summarized,the basic process of root exudates was described,the structures and types of ABC transporters were outlined and the recent research findings on the efflux of root exudate regulated by ABC transporters and their influence on rhizosphere microecology were reviewed in detail.The future research direction of ABC transporter gene in root exudates was also proposed,aiming to offer insights and references for related research field.
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