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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Effect of mixed organic substrate on α-tocopherol production by Euglena gracilis in photoheterotrophic culture
Applied Microbiology and Biotechnology, Volume 79, No. 3, Year 2008
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Description
Effects of organic carbon sources on cell growth and α-tocopherol productivity in wild and chloroplast-deficient W14ZUL strains of Euglena gracilis under photoheterotrophic culture were investigated. In both strains, the increase in cell growth was particularly high when glucose was added as the sole organic carbon source. On the other hand, α-tocopherol production per dry cell weight was enhanced by adding ethanol. Ethanol addition also increased the chlorophyll concentration in wild strain and mitochondria activity in W14ZUL strain. For effective α-tocopherol production, the effects of mixture of glucose and ethanol were investigated. The results showed that, when a mixture of glucose (6 g/l) and ethanol (4 g/l) was used, α-tocopherol productivity per culture broth was 3.89×10 -2 mg l-1 h-1, which was higher than the value obtained without addition of organic carbon source (0.92×10-2 mg l-1 h-1). In addition, under fed-batch cultivation using an internally illuminated photobioreactor, the α-tocopherol production per culture broth was 23.43 mg/l, giving a productivity of 16.27×10-2 mg l-1 h-1. © 2008 Springer-Verlag.
Authors & Co-Authors
Fujita, Tomoya
Japan, Tsukuba
University of Tsukuba
Aoyagi, H.
Japan, Tsukuba
University of Tsukuba
Ogbonna, James Chukwuma
Nigeria, Naukka
University of Nigeria
Tanaka, Hideo
Japan, Matsudo
Seitoku University
Statistics
Citations: 44
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1007/s00253-008-1443-0
ISSN:
01757598
Research Areas
Environmental