Title |
The plant pathogen Pseudomonas aeruginosa triggers a DELLA-dependent seed germination arrest in Arabidopsis
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Published in |
eLife, August 2018
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DOI | 10.7554/elife.37082 |
Pubmed ID | |
Authors |
Hicham Chahtane, Thanise Nogueira Füller, Pierre-Marie Allard, Laurence Marcourt, Emerson Ferreira Queiroz, Venkatasalam Shanmugabalaji, Jacques Falquet, Jean-Luc Wolfender, Luis Lopez-Molina |
Abstract |
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. |
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Country | Count | As % |
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France | 4 | 10% |
Germany | 4 | 10% |
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India | 1 | 2% |
Cameroon | 1 | 2% |
Switzerland | 1 | 2% |
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Other | 0 | 0% |
Unknown | 16 | 39% |
Demographic breakdown
Type | Count | As % |
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Scientists | 21 | 51% |
Members of the public | 16 | 39% |
Science communicators (journalists, bloggers, editors) | 4 | 10% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 104 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 18 | 17% |
Student > Bachelor | 16 | 15% |
Student > Ph. D. Student | 15 | 14% |
Student > Master | 7 | 7% |
Professor | 4 | 4% |
Other | 13 | 13% |
Unknown | 31 | 30% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 35 | 34% |
Biochemistry, Genetics and Molecular Biology | 19 | 18% |
Immunology and Microbiology | 3 | 3% |
Chemistry | 3 | 3% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 2% |
Other | 6 | 6% |
Unknown | 36 | 35% |