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Open Access Secondary carotenoid accumulation in flagellates of the green alga Haematococcus lacustris

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The combination of nitrogen deprivation and increased cultivation light intensity resulted in the synthesis of secondary carotenoids in flagellates of Haematococcus lacustris. The pigment pattern was characterized by high-pressure liquid chromatography analysis during the accumulation period and in response to inhibitors of carotenoid biosynthesis (diphenylamine, norflurazon and tetcyclacis). Diphenylamine treatment resulted in (i) a decrease in ketocarotenoids and (ii) an accumulation of b-carotene and zeaxanthin due to inhibition of the bcarotene oxygenase. Our results indicate that astaxanthin synthesis in H. lacustris follows the biosynthetic pathway elucidated in the marine bacterium Agrobacterium aurantiacum.
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Keywords: Haematococcus lacustris; astaxanthin; carotenoids; inhibitors of carotenoid biosynthesis; ketocarotenoids; zeaxanthin

Document Type: Research Article

Affiliations: Institute of General Botany, Friedrich-Schiller-University Jena, Am Planetarium 1, D-07743 Jena, Germany

Publication date: 1997-11-26

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