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Wacker A, Piepho M, Harwood JL, et al. Light-Induced Changes in Fatty Acid Profiles of Specific Lipid Classes in Several Freshwater Phytoplankton Species. Front Plant Sci. 2016;7:264doi: 10.3389/fpls.2016.00264.
Wacker, A., Piepho, M., Harwood, J. L., Guschina, I. A., & Arts, M. T. (2016). Light-Induced Changes in Fatty Acid Profiles of Specific Lipid Classes in Several Freshwater Phytoplankton Species. Frontiers in plant science, 7264. https://doi.org/10.3389/fpls.2016.00264
Wacker, Alexander, et al. "Light-Induced Changes in Fatty Acid Profiles of Specific Lipid Classes in Several Freshwater Phytoplankton Species." Frontiers in plant science vol. 7 (2016): 264. doi: https://doi.org/10.3389/fpls.2016.00264
Wacker A, Piepho M, Harwood JL, Guschina IA, Arts MT. Light-Induced Changes in Fatty Acid Profiles of Specific Lipid Classes in Several Freshwater Phytoplankton Species. Front Plant Sci. 2016 Mar 16;7:264. doi: 10.3389/fpls.2016.00264. eCollection 2016. PMID: 27014290; PMCID: PMC4792871.
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Front Plant Sci. 2016 Mar 16;7:264. doi: 10.3389/fpls.2016.00264. eCollection 2016.

Light-Induced Changes in Fatty Acid Profiles of Specific Lipid Classes in Several Freshwater Phytoplankton Species.

Frontiers in plant science

Alexander Wacker, Maike Piepho, John L Harwood, Irina A Guschina, Michael T Arts

Affiliations

  1. Theoretical Aquatic Ecology and Ecophysiology, Institute of Biochemistry and Biology, University of Potsdam Potsdam, Germany.
  2. Department for Ecology, Institute of Aquatic Ecology, University of Rostock Rostock, Germany.
  3. School of Biosciences, Cardiff University Cardiff, UK.
  4. Department of Chemistry and Biology, Ryerson University Toronto, ON, Canada.

PMID: 27014290 PMCID: PMC4792871 DOI: 10.3389/fpls.2016.00264

Abstract

We tested the influence of two light intensities [40 and 300 μmol PAR / (m(2)s)] on the fatty acid composition of three distinct lipid classes in four freshwater phytoplankton species. We chose species of different taxonomic classes in order to detect potentially similar reaction characteristics that might also be present in natural phytoplankton communities. From samples of the bacillariophyte Asterionella formosa, the chrysophyte Chromulina sp., the cryptophyte Cryptomonas ovata and the zygnematophyte Cosmarium botrytis we first separated glycolipids (monogalactosyldiacylglycerol, digalactosyldiacylglycerol, and sulfoquinovosyldiacylglycerol), phospholipids (phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, and phosphatidylserine) as well as non-polar lipids (triacylglycerols), before analyzing the fatty acid composition of each lipid class. High variation in the fatty acid composition existed among different species. Individual fatty acid compositions differed in their reaction to changing light intensities in the four species. Although no generalizations could be made for species across taxonomic classes, individual species showed clear but small responses in their ecologically-relevant omega-3 and omega-6 polyunsaturated fatty acids (PUFA) in terms of proportions and of per tissue carbon quotas. Knowledge on how lipids like fatty acids change with environmental or culture conditions is of great interest in ecological food web studies, aquaculture, and biotechnology, since algal lipids are the most important sources of omega-3 long-chain PUFA for aquatic and terrestrial consumers, including humans.

Keywords: fatty acid changes; freshwater algae; light adaptation; lipid classes

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