Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 107, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2021.104325
Keywords
Marine-derived tocopherol; Vitamin E; Tocomonoenols; Biosynthesis; alpha-Tocopherol; Tocochromanol profile; Tocotrienols
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Funding
- Food Security Center of the University of Hohenheim
- German Academic Exchange Service (DAAD)
- German Federal Ministry of Economic Cooperation and Development (BMZ)
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This study identified 11'-alpha-tocomonoenol as the predominant form of tocochromanol in cyanobacteria and microalgae, particularly Tetraselmis sp., and reported its presence in aquatic photosynthetic organisms for the first time.
alpha-Tocomonoenols are vitamin E-derivatives with a single double-bond in the tocochromanol sidechain. Currently, two congeners are known: 11'-alpha-tocomonoenol and 12'-alpha-tocomonoenol, the later better known as marine-derived tocopheml (MDT). Information regarding their presence in photosynthetic aquatic organisms is scarce. We thus determined vitamin E congeners and derivatives in micmalgae and cyanobacteria to assess their potential as sources of alpha-tocomonoenols. Tocochromanols were extracted from freeze-dried cyanobacteria (Arthrospira platensis) and microalgae (Nannochloropsis oceanica, Chlorella vulgaris and Tetraselmis sp.) and quantified by HPLC-FLD. alpha-Tocomonoenol was quantified in N. oceanica and Tetraselmis sp. where it was the second most abundant tocochromanol following alpha-tocopherol. LC-MSn and GC-MS confirmed that 11'-alpha-tocomonoenol and not MDT was the predominant alpha-tocomonoenol form in evaluated cyanobacteria and microalgae. No significant correlations were observed between tocomonoenol or vitamin E contents and fatty acid profiles. In conclusion, microalgae and particularly Tetraselmis sp. are novel sources of 11'-alpha-tocomonoenol, a tocochromanol not previously reported in aquatic photosynthetic organisms.
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