Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Effect of Growth Conditions on the Biomass and Lipid Production of Euglena gracilis Cells Raised in Mixotrophic Culture

Mixotrophic 배양조건에 따른 Euglena gracilis의 성장과 지질에 미치는 영향

  • Jeong, U-Cheol (Department of Seafood and Aquaculture Science, Gyeongsang National University) ;
  • Choi, Jong-Kuk (Department of Seafood and Aquaculture Science, Gyeongsang National University) ;
  • Kang, Chang-Min (Institute of Toxicology) ;
  • Choi, Byeong-Dae (Department of Seafood and Aquaculture Science, Gyeongsang National University) ;
  • Kang, Seok-Joong (Department of Seafood and Aquaculture Science, Gyeongsang National University)
  • 정우철 (경상대학교 해양식품생명의학과) ;
  • 최종국 (경상대학교 해양식품생명의학과) ;
  • 강창민 (안전성평가연구소 경남환경독성본부) ;
  • 최병대 (경상대학교 해양식품생명의학과) ;
  • 강석중 (경상대학교 해양식품생명의학과)
  • Received : 2016.01.19
  • Accepted : 2016.02.16
  • Published : 2016.02.28
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Abstract

Microalgae are functional foods because they contain special anti-aging inhibitors and other functional components, such as ecosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and omega-3 polyunsaturated fatty acids. Many of these functional dietary components are absent in animals and terrestrial plants. Thus, microalgae are widely utilized in human functional foods and in the feed provided to farmed fish and terrestrial livestock. Many marine organisms consume microalgae, often because they are in an appropriate portion of the cell size spectrum, but also because of their nutritional content. The nutritional requirements of marine organisms differ from those of terrestrial animals. After hatching, marine animals need small live forage species that have high omega-3 polyunsaturated fatty acid contents, including EPA and DHA. Euglena cells have both plant and animal characteristics; they are motile, elliptical in shape, 15-500 μm in diameter, and have a valuable nutritional content. Mixotrophic cell cultivation provided the best growth rates and nutritional content. Diverse carbon (fructose, lactose, glucose, maltose and sucrose) and nitrogen (tryptone, peptone, yeast extract, urea and sodium glutamate) supported the growth of microalgae with high lipid contents. We found that the best carbon and nitrogen sources for the production of high quality Euglena cells were glucose (10 g L–1) and sodium glutamate (1.0 g L–1), respectively.

Keywords

References

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