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Título: | 2-Tridecanone impacts surface-associated bacterial behaviours and hinders plant-bacteria interactions |
Autor: | López-Lara, Isabel M. CSIC; Nogales, Joaquina CSIC; Pech-Canul, Ángel de la Cruz; Calatrava-Morales, Nieves CSIC; Bernabéu-Roda, Lydia CSIC ORCID; Durán, Paloma; Cuellar, Virginia CSIC ORCID; Olivares Pascual, José CSIC; Álvarez, L.; Palenzuela-Bretones, D.; Romero, M.; Heeb, S.; Cámara, Miguel; Geiger, Otto; Soto, María José CSIC ORCID | Fecha de publicación: | 2018 | Editor: | Blackwell Publishing | Citación: | Environmental Microbiology 20: 2049- 2065 (2018) | Resumen: | Surface motility and biofilm formation are behaviours which enable bacteria to infect their hosts and are controlled by different chemical signals. In the plant symbiotic alpha-proteobacterium Sinorhizobium meliloti, the lack of long-chain fatty acyl-coenzyme A synthetase activity (FadD) leads to increased surface motility, defects in biofilm development and impaired root colonization. In this study, analyses of lipid extracts and volatiles revealed that a fadD mutant accumulates 2-tridecanone (2-TDC), a methylketone (MK) known as a natural insecticide. Application of pure 2-TDC to the wild-type strain phenocopies the free-living and symbiotic behaviours of the fadD mutant. Structural features of the MK determine its ability to promote S. meliloti surface translocation, which is mainly mediated by a flagella-independent motility. Transcriptomic analyses showed that 2-TDC induces differential expression of iron uptake, redox and stress-related genes. Interestingly, this MK also influences surface motility and impairs biofilm formation in plant and animal pathogenic bacteria. Moreover, 2-TDC not only hampers alfalfa nodulation but also the development of tomato bacterial speck disease. This work assigns a new role to 2-TDC as an infochemical that affects important bacterial traits and hampers plant-bacteria interactions by interfering with microbial colonization of plant tissues. | Versión del editor: | https://sfamjournals.onlinelibrary.wiley.com/doi/abs/10.1111/1462-2920.14083 | URI: | http://hdl.handle.net/10261/175469 | DOI: | 10.1111/1462-2920.14083 | Identificadores: | doi: 10.1111/1462-2920.14083 issn: 1462-2912 |
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