Journal
LIMNOLOGY AND OCEANOGRAPHY LETTERS
Volume 2, Issue 4, Pages 119-129Publisher
WILEY
DOI: 10.1002/lol2.10043
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Funding
- National Science Foundation [OCE-1154320, OCE-1205233]
- Gordon and Betty Moore Foundation [3304]
- Simons Foundation (SCOPE award) [329108]
- National Science Foundation Chemical Oceanography Program [OCE-01316036, OCE-0723667]
- WHOI Ocean Life Institute Fellowship
- National Defense Science and Engineering Fellowship
- National Science Foundation Biological Oceanography Program [OCE-01316036, OCE-0723667]
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Marine eukaryotic phytoplankton adapt to low phosphorus (P) in the oceans through a variety of step-wise mechanisms including lipid substitution and decreased nucleic acid content. Here, we examined the impact of low P concentrations on intracellular metabolites whose abundances can be quickly adjusted by cellular regulation within laboratory cultures of three model phytoplankton and in field samples from the Atlantic and Pacific Oceans. We quantified the relative abundances of monophosphate nucleotides and their corresponding nucleosides, using a combination of targeted and untargeted metabolomics methods. Under P-deficient conditions, we observed a marked decrease in adenosine 50-monophosphate (AMP) with a concomitant increase in adenosine. This shift occurred within all detected pairs of monophosphate nucleotides and nucleosides, and was consistent with previous work showing transcriptional changes in nucleotide synthesis and salvage under P-deficient conditions for model eukaryotes. In the field, we observed AMP-to-adenosine ratios that were similar to those in laboratory culture under P-deficient conditions.
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