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Cytokinin production by Pseudomonas fluorescens G20-18 determines biocontrol activity against Pseudomonas syringae in Arabidopsis

Großkinsky, Dominik K ; Tafner, Richard ; Moreno, María V ; Stenglein, Sebastian A ; García de Salamone, Inés E ; Nelson, Louise M ; Novák, Ondřej ; Strnad, Miroslav ; van der Graaff, Eric ; Roitsch, Thomas

Scientific reports, 2016-03, Vol.6 (1), p.23310-23310, Article 23310 [Periódico revisado por pares]

England: Nature Publishing Group

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Cytokinin production by Pseudomonas fluorescens G20-18 determines biocontrol activity against Pseudomonas syringae in Arabidopsis
Autor: Großkinsky, Dominik K ; Tafner, Richard ; Moreno, María V ; Stenglein, Sebastian A ; García de Salamone, Inés E ; Nelson, Louise M ; Novák, Ondřej ; Strnad, Miroslav ; van der Graaff, Eric ; Roitsch, Thomas
Assuntos: Abiotic stress ; Arabidopsis - microbiology ; Biological control ; Biomass ; Cell division ; Chromatography, High Pressure Liquid ; Complementation ; Cytokinins ; Cytokinins - analysis ; Cytokinins - biosynthesis ; Cytokinins - pharmacology ; Gene expression ; Host plants ; Infections ; Microorganisms ; Pathogens ; Physiology ; Plant diseases ; Plant Diseases - microbiology ; Plant Growth Regulators - pharmacology ; Plant Leaves - microbiology ; Plant protection ; Plant resistance ; Pseudomonas fluorescens - metabolism ; Pseudomonas syringae - drug effects ; Pseudomonas syringae - growth & development ; Pseudomonas syringae - pathogenicity ; Salicylic acid ; Salicylic Acid - pharmacology ; Tandem Mass Spectrometry
É parte de: Scientific reports, 2016-03, Vol.6 (1), p.23310-23310, Article 23310
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Plant beneficial microbes mediate biocontrol of diseases by interfering with pathogens or via strengthening the host. Although phytohormones, including cytokinins, are known to regulate plant development and physiology as well as plant immunity, their production by microorganisms has not been considered as a biocontrol mechanism. Here we identify the ability of Pseudomonas fluorescens G20-18 to efficiently control P. syringae infection in Arabidopsis, allowing maintenance of tissue integrity and ultimately biomass yield. Microbial cytokinin production was identified as a key determinant for this biocontrol effect on the hemibiotrophic bacterial pathogen. While cytokinin-deficient loss-of-function mutants of G20-18 exhibit impaired biocontrol, functional complementation with cytokinin biosynthetic genes restores cytokinin-mediated biocontrol, which is correlated with differential cytokinin levels in planta. Arabidopsis mutant analyses revealed the necessity of functional plant cytokinin perception and salicylic acid-dependent defence signalling for this biocontrol mechanism. These results demonstrate microbial cytokinin production as a novel microbe-based, hormone-mediated concept of biocontrol. This mechanism provides a basis to potentially develop novel, integrated plant protection strategies combining promotion of growth, a favourable physiological status and activation of fine-tuned direct defence and abiotic stress resilience.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Cytokinin production by Pseudomonas fluorescens G20-18 determines biocontrol activity against Pseudomonas syringae in Arabidopsis

Großkinsky, Dominik K ; Tafner, Richard ; Moreno, María V ; Stenglein, Sebastian A ; García de Salamone, Inés E ; Nelson, Louise M ; Novák, Ondřej ; Strnad, Miroslav ; van der Graaff, Eric ; Roitsch, Thomas

England: Nature Publishing Group

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