Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2011 |
| Auteurs (10) | : | POPENDORF K,j TANAKA Tsuneo PUJO-PAY Mireille LAGARIA A COURTIES C CONAN Pascal ORIOL L SOFEN L,e MOUTIN Thierry VAN MOOY B,a,s |
| Revue scientifique | : | Biogeosciences |
| Volume | : | 8 |
| Fascicule | : | 12 |
| Pages | : | 3733-3745 |
| DOI | : | 10.5194/bg-8-3733-2011 |
| URL | : | <go to isi>://wos:000298580900018 |
| Abstract | : | Intact polar membrane lipids compose a significant fraction of cellular material in plankton and their synthesis imposes a substantial constraint on planktonic nutrient requirements. As a part of the Biogeochemistry from the Oligotrophic to the Ultraoligotrophic Mediterranean (BOUM) cruise we examined the distribution of several classes of intact polar diacylglycerolipids (IP-DAGs) across the Mediterranean, and found that phospholipid concentration as a percent of total lipids correlated with phosphate concentration. In addition, the ratios of non-phosphorus lipids to phospholipids - sulfoquinovosyldiacylglycerol (SQDG) to phosphatidylglycerol (PG), and betaine lipids to phosphatidylcholine (PC) - were also found to increase from west to east across the Mediterranean. Additionally, microcosm incubations from across the Mediterranean were amended with phosphate and ammonium, and in the course of several days nutrient amendments elicited a shift in the ratios of IP-DAGs. These experiments were used to assess the relative contribution of community shifts and physiological response to the observed change in IP-DAGs across the Mediterranean. The ratio of SQDG to chlorophyll-a was also explored as an indicator of phytoplankton response to nitrogen availability. This study is the first to demonstrate the dynamic response of membrane lipid composition to changes in nutrients in a natural, mixed planktonic community. |
| Mots-clés | : | south-pacific ocean rhodobacter-sphaeroides phosphorus limitation organic phosphorus microbial biomass metabolic state surface waters betaine lipids phytoplankton sediments Environmental Sciences & Ecology Geology |
| Commentaire | : | ISI Document Delivery No.: 869EZ Times Cited: 11 Cited Reference Count: 41 Popendorf, K. J. Tanaka, T. Pujo-Pay, M. Lagaria, A. Courties, C. Conan, P. Oriol, L. Sofen, L. E. Moutin, T. Van Mooy, B. A. S. CONAN, Pascal/B-7646-2011; Tanaka, Tsuneo/G-3751-2011 CONAN, Pascal/0000-0002-2879-9411; National Science Foundation [OCE-0646944, OCE-1031143] The authors would like to thank the captain and crew of the R/V L'Atalante, Josephine Ras and Herve Claustre for the chlorophyll data (HPLC method), Stella Psarra for contributions to chlorophyll data (fluorometry method) and helpful comments on the manuscript, Helen Fredricks for HPLC-MS guidance, Krista Longnecker for assistance culturing T. pseudonana for the DGCC standard, Catherine Carmichael for her aid in quantifying the DGCC standard, Patrick Martin for his work with MS betaine comparisons, James Fulton for helpful discussions, and all of the scientists who participated in and contributed to the BOUM cruise. Additional thanks to two anonymous reviewers for helpful suggestions during the open review process. Funding for this work was provided by a grant from the National Science Foundation (OCE-0646944 and OCE-1031143). 11 Copernicus gesellschaft mbh Gottingen Ecology; Geosciences, Multidisciplinary |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Popendorf KJ, Tanaka T, Pujo-Pay M, Lagaria A, Courties C, Conan P, Oriol L, Sofen LE, Moutin T, Van Mooy BAS (2011) Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability. Biogeosciences 8: 3733-3745 | doi: 10.5194/bg-8-3733-2011
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