Secondary carotenoid accumulation in flagellates of the green alga Haematococcus lacustris
Abstract: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.
Document Type: Research Article
Affiliations: Institute of General Botany, Friedrich-Schiller-University Jena, Am Planetarium 1, D-07743 Jena, Germany
Publication date: November 26, 1997