Research Progress of Promoting Biocontrol Bacteria in Rice Rhizosphere

The irrational application of rice chemical fertilizer and the reduction of rice quality and yield caused by rice diseases have seriously affected agricultural production and the environment. To grow rice more scientifically and greenly, plant growth-promoting rhizobacteria (PGPR) has developed rapidly as a new control method for plant diseases. The discovery of PGPR is an essential process in biological control research. PGPR has many species, excellent biological traits, diverse antagonistic mechanisms, and a wide range of parasitism, which is an essential biological control method to solve the excessive application of chemical fertilizers and pesticides in rice production and has broad development prospects. In this paper, we summarize the research progress of PGPR application to rice and other plants in recent years, expound on the direct and indirect mechanisms, and look forward to the development trend of follow-up research in order to provide a theoretical reference for the in-depth study and better application of biocontrol bacteria.