The Role of Secretion Systems, Effectors, and Secondary Metabolites of Beneficial Rhizobacteria in Interactions With Plants and Microbes

Miriam Lucke, Mario Gabriel Correa, Asaf Levy*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

49 Scopus citations

Abstract

Beneficial rhizobacteria dwell in plant roots and promote plant growth, development, and resistance to various stress types. In recent years there have been large-scale efforts to culture root-associated bacteria and sequence their genomes to uncover novel beneficial microbes. However, only a few strains of rhizobacteria from the large pool of soil microbes have been studied at the molecular level. This review focuses on the molecular basis underlying the phenotypes of three beneficial microbe groups; (1) plant-growth promoting rhizobacteria (PGPR), (2) root nodulating bacteria (RNB), and (3) biocontrol agents (BCAs). We focus on bacterial proteins and secondary metabolites that mediate known phenotypes within and around plants, and the mechanisms used to secrete these. We highlight the necessity for a better understanding of bacterial genes responsible for beneficial plant traits, which can be used for targeted gene-centered and molecule-centered discovery and deployment of novel beneficial rhizobacteria.

Original languageAmerican English
Article number589416
JournalFrontiers in Plant Science
Volume11
DOIs
StatePublished - 9 Nov 2020

Bibliographical note

Publisher Copyright:
© Copyright © 2020 Lucke, Correa and Levy.

Keywords

  • beneficial bacteria
  • biocontrol agents
  • effectors
  • plant growth promoting bacteria
  • rhizosphere
  • root nodulating bacteria
  • secretion systems

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