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Título: | Marine heterotrophic bacteria synthesize non-phosphorus lipids upon phosphorus stress |
Autor: | Sebastián, Marta CSIC ORCID; González, José M.; Fredricks, H.F.; Van Mooy, B.; Koblízek, Michal; Sà, Elisabet L. CSIC ORCID ; Mostajir, B.; Pitta, Paraskevi; Gasol, Josep M. CSIC ORCID | Fecha de publicación: | 22-feb-2015 | Editor: | Association for the Sciences of Limnology and Oceanography | Citación: | 2015 Aquatic Sciences Meeting. Program Book: 51 (2015) | Resumen: | Phosphorus (P) is an essential nutrient for life. The replacement of membrane phospholipids with non-phosphorus lipids constitutes an important strategy to allow growth on phosphate-limited environments. In the ocean, this strategy has been reported in phytoplankton, but not in heterotrophic bacteria. A phospholipase C was recently identified to be required for lipid remodelling in a soil bacterium during P-limitation. In this study we show this enzyme is widespread in bacterial taxa and frequently found in ocean metagenomes. In SAR11 and other proteobacterial isolates, this gene is frequently neighbour to a glycosyltransferase that could be involved in glycolipid biosynthesis. Experiments with marine isolates showed up-regulation of transcription of both the phospholipase C and the glycosyltransferase upon P-starvation. These results suggest that marine heterotrophic bacteria may substitute phospholipids for glycolipids to reduce their P-demand. Lipid measurements in environmental samples confirmed that indeed there is an important enrichment in glycolipids in the heterotrophic bacterial fraction under P-depleted conditions. Hence, lipid remodelling seems to be a widespread mechanism among marine microbes for surviving in the vast oligotrophic areas of the ocean | Descripción: | Aquatic Sciences Meeting, Aquatic Sciences: Global And Regional Perspectives - North Meets South, 22-27 February 2015, Granada, Spain | Versión del editor: | http://www.sgmeet.com/aslo/granada2015/program.asp | URI: | http://hdl.handle.net/10261/135921 |
Aparece en las colecciones: | (ICM) Comunicaciones congresos |
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