Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 409300
Title Productivity and selective accumulation of carotenoids of the novel extremophile microalga Chlamydomonas acidophila grown with different carbon sources in batch systems
Author(s) Cuaresma, M.; Casal, C.; Forján, E.; Vílchez, C.
Source Journal of Industrial Microbiology and Biotechnology 38 (2011)1. - ISSN 1367-5435 - p. 167 - 177.
Department(s) Bioprocess Engineering
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) spirulina-platensis - xanthophyll cycle - mixotrophic cultures - macular disease - nitrogen-source - tinto river - cultivation - stress - zeaxanthin - lutein
Abstract Cultivation of extremophile microorganisms has attracted interest due to their ability to accumulate highvalue compounds. Chlamydomonas acidophila is an acidophile green microalga isolated by our group from Tinto River, an acidic river that flows down from the mining area in Huelva, Spain. This microalga accumulates high concentrations of lutein, a very well-known natural antioxidant. The aim of this study is to assess use of different carbon sources (CO2, glucose, glycerol, starch, urea, and glycine) for efficient growth of and carotenoid production by C. acidophila. Our results reveal that growth of the microalga on different carbon sources resulted in different algal biomass productivities, urea being as efficient as CO2 when used as sole carbon source (*20 g dry biomass m–2 day–1). Mixotrophic growth on glucose was also efficient in terms of biomass production (*14 g dry biomass m–2 day–1). In terms of carotenoid accumulation, mixotrophic growth on urea resulted in even higher productivity of carotenoids (mainly lutein, probably via a-carotene) than obtained with photoautotrophic cultures (70% versus 65% relative abundance of lutein, respectively). The accumulated lutein concentrations of C. acidophila reported in this work (about 10 g/kg dry weight, produced in batch systems) are among the highest reported for a microalga. Glycerol and glycine seem to enhance b-carotene biosynthesis, and when glycine is used as carbon source, zeaxanthin becomes the most accumulated carotenoid in the microalga. Strategies for production of lutein and zeaxanthin are suggested based on the obtained results.
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