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Plant immune system activation is necessary for efficient root colonization by auxin-secreting beneficial bacteria.
- Source :
-
Cell host & microbe [Cell Host Microbe] 2021 Oct 13; Vol. 29 (10), pp. 1507-1520.e4. Date of Electronic Publication: 2021 Oct 04. - Publication Year :
- 2021
-
Abstract
- Although plant roots encounter a plethora of microorganisms in the surrounding soil, at the rhizosphere, plants exert selective forces on their bacterial colonizers. Unlike immune recognition of pathogenic bacteria, the mechanisms by which beneficial bacteria are selected and how they interact with the plant immune system are not well understood. To better understand this process, we studied the interaction of auxin-producing Bacillus velezensis FZB42 with Arabidopsis roots and found that activation of the plant immune system is necessary for efficient bacterial colonization and auxin secretion. A feedback loop is established in which bacterial colonization triggers an immune reaction and production of reactive oxygen species, which, in turn, stimulate auxin production by the bacteria. Auxin promotes bacterial survival and efficient root colonization, allowing the bacteria to inhibit fungal infection and promote plant health. Thus, a feedback loop between bacteria and the plant immune system promotes the fitness of both partners.<br />Competing Interests: Declaration of interests The authors declare no competing interests.<br /> (Copyright © 2021 Elsevier Inc. All rights reserved.)
- Subjects :
- Arabidopsis genetics
Arabidopsis microbiology
Bacillus genetics
Bacillus growth & development
Bacillus metabolism
Host Microbial Interactions
Plant Roots immunology
Reactive Oxygen Species immunology
Rhizosphere
Arabidopsis immunology
Indoleacetic Acids metabolism
Plant Immunity
Plant Roots microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 1934-6069
- Volume :
- 29
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Cell host & microbe
- Publication Type :
- Academic Journal
- Accession number :
- 34610294
- Full Text :
- https://doi.org/10.1016/j.chom.2021.09.005