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    Phosphorus supply drives rapid turnover of membrane phospholipids in the diatom Thalassiosira pseudonana

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    Martin et al. combined final.pdf (1.107Mb)
    Date
    2010-11
    Author
    Martin, Patrick  Concept link
    Van Mooy, Benjamin A. S.  Concept link
    Heithoff, Abigail  Concept link
    Dyhrman, Sonya T.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4910
    As published
    https://doi.org/10.1038/ismej.2010.192
    Keyword
     Betaine lipids; DGCC; Lipid substitution; Non-phosphorus lipids; Phosphatidylcholine; Diatoms 
    Abstract
    In low phosphorus (P) marine systems phytoplankton replace membrane phospholipids with non-phosphorus lipids, but it is not known how rapidly this substitution occurs. Here, when cells of the model diatom Thalassiosira pseudonana were transferred from P-replete medium to P-free medium, the phospholipid content of the cells rapidly declined within 48 h from 45±0.9% to 21±4.5% of total membrane lipids; the difference was made up by non-phosphorus lipids. Conversely, when P-limited T. pseudonana were resupplied with P, cells reduced the percentage of their total membrane lipid contributed by a non-phosphorus lipid from 43±1.5% to 7.3±0.9% within 24 h, while the contribution by phospholipids rose from 2.2±0.1% to 44±3%. This dynamic phospholipid reservoir contained sufficient P to synthesize multiple haploid genomes, suggesting that phospholipid turnover could be an important P source for cells. Field observations of phytoplankton lipid content may thus reflect short-term changes in P supply and cellular physiology, rather than simply long-term adjustment to the environment.
    Description
    Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in The ISME Journal 5 (2011): 1057–1060, doi:10.1038/ismej.2010.192.
    Collections
    • Biology
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Preprint: Martin, Patrick, Van Mooy, Benjamin A. S., Heithoff, Abigail, Dyhrman, Sonya T., "Phosphorus supply drives rapid turnover of membrane phospholipids in the diatom Thalassiosira pseudonana", 2010-11, https://doi.org/10.1038/ismej.2010.192, https://hdl.handle.net/1912/4910
     

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