title: Effect of Tween 80 on the growth, lipid accumulation and fatty acid composition of Thraustochytrium aureum ATCC 34304.
abstract: Thraustochytrium aureum ATCC 34304 was grown in the presence and absence of polyoxyethylene sorbitan monooleate (Tween 80). The aim of this work was to obtain basic knowledge about the effect of Tween 80 on growth, lipid accumulation and fatty acid composition in T. aureum. The addition of Tween 80 to a culture medium significantly enhanced the growth of T. aureum, and the biomass increased with an increase of Tween 80 content. Total lipid content and total fatty acid content were significantly higher in 1.0% Tween 80 in comparison with the control (absence of Tween 80). The fatty acid profile showed that the content of C18:1n-9 (oleic acid) significantly increased as a result of the addition of Tween 80. These results indicated that part of the Tween 80 added to the medium was utilized as a carbon source or that the oleate included in Tween 80 was directly incorporated into T. aureum cells as a fatty acid. Neither the DHA content nor the percentage of DHA did not change in spite of the addition of Tween 80. However, the DHA yield significantly increased because the biomass increased due to the addition of Tween 80.
authors.affiliation: Laboratory of Marine Bioscience, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan. yousuketaoka@nissui.co.jp
authors.forename: Yousuke
authors.initials: Y
authors.lastname: Taoka
authors.forename: Naoki
authors.initials: N
authors.lastname: Nagano
authors.forename: Yuji
authors.initials: Y
authors.lastname: Okita
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Izumida
authors.forename: Shinichi
authors.initials: S
authors.lastname: Sugimoto
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hayashi
mesh_terms: D003470:Culture Media; D004281:Docosahexaenoic Acids / Q000032:analysis; D005227:Fatty Acids / Q000737:chemistry*; D050356:Lipid Metabolism / Q000187:drug effects*; D008055:Lipids / Q000032:analysis; D019301:Oleic Acid / Q000378:metabolism; D011136:Polysorbates / Q000494:pharmacology*; D058009:Stramenopiles / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D013501:Surface-Active Agents / Q000494:pharmacology*
chemical_list: D003470:Culture Media; D005227:Fatty Acids; D008055:Lipids; D011136:Polysorbates; D013501:Surface-Active Agents; D004281:Docosahexaenoic Acids; D019301:Oleic Acid