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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lang, Julien Gonzalez-Mula, Almudena Taconnat, Ludivine Clement, Gilles Faure, Denis |
| Description | Country affiliation: France Author Affiliation: Lang J ( Institute for Integrative Biology of the Cell (I2BC), CNRS CEA Université Paris-Sud, Université Paris-Saclay, Saclay Plant Sciences, Avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France.); Gonzalez-Mula A ( Institute for Integrative Biology of the Cell (I2BC), CNRS CEA Université Paris-Sud, Université Paris-Saclay, Saclay Plant Sciences, Avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France.); Taconnat L ( POPS Transcriptomic Platform - Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, Université Paris-Sud, Université d'Evry, Université Paris-Diderot, Sorbonne Paris-Cité Université Paris-Saclay, Batiment 630, 91405, Orsay, France.); Clement G ( Plateforme de Chimie - Métabolisme, INRA Centre de Versailles-Grignon, Route de Saint-Cyr, 78026, Versailles Cedex, France.); Faure D ( Institute for Integrative Biology of the Cell (I2BC), CNRS CEA Université Paris-Sud, Université Paris-Saclay, Saclay Plant Sciences, Avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France.) |
| Abstract | In the tumor-inducing (Ti) Agrobacterium tumefaciens, quorum sensing activates the horizontal transfer of the virulent Ti plasmid. In pure culture, this process can be impaired by the A. tumefaciens BlcC lactonase, whose expression is induced by gamma-aminobutyrate (GABA). It was therefore hypothesized that host GABA content might modulate quorum sensing and virulence gene dissemination during A. tumefaciens infection. We examined GABA metabolism and transport in Arabidopsis thaliana tumors combining transcriptomic, metabolomic and histological approaches. In addition, using genetically modified plants and bacteria, we evaluated the impact of plant host GABA content on Ti plasmid dissemination. The results showed that GABA and free proline, which acts as an antagonist of GABA uptake in A. tumefaciens, accumulated in wild-type tumors relative to uninfected plant tissues. Moreover, comparisons of tumors induced on Col-0 and her1 plants showed that the increase in the plant GABA : proline ratio was associated with both the upregulated expression of the blcC gene and the decreased dissemination of Ti plasmid in tumor-colonizing A. tumefaciens populations. This work demonstrates experimentally that the variation in the GABA content in plant tumors can interfere with the dissemination of A. tumefaciens Ti plasmids, and therefore highlights plant GABA content as an important trait in the struggle against pathogenic bacteria. |
| File Format | HTM / HTML |
| ISSN | 0028646X |
| Issue Number | 3 |
| Journal | New Phytologist |
| Volume Number | 210 |
| e-ISSN | 14698137 |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2016-05-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science |
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