Application of Rhizospheric Biocontrol Consortia and the Potential Mechanisms of Their Enhancing Efficacy on Disease-suppressive Effect

doi:10.13560/j.cnki.biotech.bull.1985.2020-0994

Abstract

Abstract: The development and application of rhizospheric biocontrol microorganism-based biopesticide is an environmentally friendly strategy for the control of plant diseases. Two major barriers limiting the disease-inhibiting function of rhizosphere biocontrol microbes are inadequate host and soil colonization as well as inefficient suppression of phytopathogen growth. Currently,it has been verified from a fair amount of studies that rhizospheric biocontrol consortia are capable of improving the disease-suppressing effect of biocontrol microorganisms of rhizosphere. First,we review the current status of applying rhizosphere biocontrol consortia in managing plant diseases and the potential mechanisms of enhancing disease-suppressive efficacy such as regulating colonization,pathogen inhibition and induced systemic resistance by microbial interactions within the rhizosphere biocontrol consortia. Then,we discuss the relationships between the effect of the rhizospheric biocontrol consortia on enhancing the disease-inhibiting function and the factors of growth,biofilm formation,motility,resource competitiveness,and biosynthesis of antimicrobial compounds of the rhizosphere biocontrol microbes,respectively. Further,we prospect the directions of future study on rhizosphere biocontrol consortia and the tactics for elevating the efficiencies of their construction and application. Finally,we point out the concerned scientific topics in further deepening the study on the efficacy-enhancing mechanism of rhizospheric biocontrol consortia,and emphasize the strategy for constructing them by simplifying rhizosphere microbiome and the importance of applying rhizosphere biocontrol consortia together with a single strain of the disease-suppressive microorganisms.

Key words: rhizosphere biocontrol consortium, plant diseases, colonization, pathogen inhibition, induced systemic resistance

WANG Wei-xiong, SHEN Bo, JIA Hong-bai, QIAO Jun-qing, NIU Ben. Application of Rhizospheric Biocontrol Consortia and the Potential Mechanisms of Their Enhancing Efficacy on Disease-suppressive Effect[J]. Biotechnology Bulletin, 2020, 36(9): 31-41.

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