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The Thiamine Content of Phytoplankton Cells Is Affected by Abiotic Stress and Growth Rate
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
2013 (English)In: Microbial Ecology, ISSN 0095-3628, E-ISSN 1432-184X, Vol. 65, no 3, 566-577 p.Article in journal (Refereed) Published
Abstract [en]

Thiamine (vitamin B-1) is produced by many plants, algae and bacteria, but by higher trophic levels, it must be acquired through the diet. We experimentally investigated how the thiamine content of six phytoplankton species belonging to five different phyla is affected by abiotic stress caused by changes in temperature, salinity and photon flux density. Correlations between growth rate and thiamine content per cell were negative for the five eukaryotic species, but not for the cyanobacterium Nodularia spumigena. We demonstrate a high variability in thiamine content among phytoplankton species, with the highest content in N. spumigena. Salinity was the factor with the strongest effect, followed by temperature and photon flux density, although the responses varied between the investigated phytoplankton species. Our results suggest that regime shifts in phytoplankton community composition through large-scale environmental changes has the potential to alter the thiamine availability for higher trophic levels. A decreased access to this essential vitamin may have serious consequences for aquatic food webs.

Place, publisher, year, edition, pages
2013. Vol. 65, no 3, 566-577 p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-200098DOI: 10.1007/s00248-012-0156-1ISI: 000317421000005OAI: oai:DiVA.org:uu-200098DiVA: diva2:622703
Available from: 2013-05-23 Created: 2013-05-20 Last updated: 2013-05-23Bibliographically approved

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