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The plant pathogen Pseudomonas aeruginosa triggers a DELLA-dependent seed germination arrest in Arabidopsis.
Journal article

The plant pathogen Pseudomonas aeruginosa triggers a DELLA-dependent seed germination arrest in Arabidopsis.

  • Chahtane H Department of Plant Biology, University of Geneva, Geneva, Switzerland.
  • Nogueira Füller T Department of Plant Biology, University of Geneva, Geneva, Switzerland.
  • Allard PM School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Geneva, Switzerland.
  • Marcourt L School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Geneva, Switzerland.
  • Ferreira Queiroz E School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Geneva, Switzerland.
  • Shanmugabalaji V Department of Plant Biology, University of Geneva, Geneva, Switzerland.
  • Falquet J University of Geneva, Geneva, Switzerland.
  • Wolfender JL School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne, Geneva, Switzerland.
  • Lopez-Molina L Department of Plant Biology, University of Geneva, Geneva, Switzerland.
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  • 2018-08-29
Published in:
  • eLife. - 2018
A. thaliana
DELLA factors
abscisic acid
germination
oxyvinylglycines
plant biology
pseudomonas aeruginosa
quorum sensing
Abscisic Acid
Aminobutyrates
Antibody Specificity
Arabidopsis
Arabidopsis Proteins
Discriminant Analysis
Gene Expression Regulation, Plant
Germination
Gibberellins
Glycine
Least-Squares Analysis
Metabolomics
Pseudomonas aeruginosa
Seeds
Signal Transduction
Triazoles
English To anticipate potential seedling damage, plants block seed germination under unfavorable conditions. Previous studies investigated how seed germination is controlled in response to abiotic stresses through gibberellic and abscisic acid signaling. However, little is known about whether seeds respond to rhizosphere bacterial pathogens. We found that Arabidopsis seed germination is blocked in the vicinity of the plant pathogen Pseudomonas aeruginosa. We identified L-2-amino-4-methoxy-trans-3-butenoic acid (AMB), released by P. aeruginosa, as a biotic compound triggering germination arrest. We provide genetic evidence that in AMB-treated seeds DELLA factors promote the accumulation of the germination repressor ABI5 in a GA-independent manner. AMB production is controlled by the quorum sensing system IQS. In vitro experiments show that the AMB-dependent germination arrest protects seedlings from damage induced by AMB. We discuss the possibility that this could serve as a protective response to avoid severe seedling damage induced by AMB and exposure to a pathogen.
Language
  • English
Open access status
gold
Identifiers
Persistent URL
https://sonar.ch/global/documents/46642
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