Title: Evidence for anomalous xanthophyll composition in a clone of Dunaliella tertiolecta (Chlorophyceae)
Abstract:Clone ‘Dun’ of Dunaliella tertiolecta Butcher showed the following carotenoid composition: β-carotene (11%), cis-γ-carotene(5%), lutein (68%), lutein 5,6-epoxide (7%), cis-neoxanthin (9%) and traces o...Clone ‘Dun’ of Dunaliella tertiolecta Butcher showed the following carotenoid composition: β-carotene (11%), cis-γ-carotene(5%), lutein (68%), lutein 5,6-epoxide (7%), cis-neoxanthin (9%) and traces of α-carotene. Discounting quantitative differences, clone Dun differed qualitatively from all other previously studied strains of Dunaliella, including the type strain of D. tertiolecta, in lacking violaxanthin and possessing lutein epoxide in its stead. A similar discrepancy was found in the Dunaliella salina (Dunal) Teodoresco pigments reported in the literature for two clones, where one clone contained an unidentified xanthophyll in place of the violaxanthin produced by the other clone. It appears that clone Dun lacks the light-induced zeaxanthin ⇌ antheraxanthin ⇌ violaxanthin interconversion xanthophyll cycle previously postulated for Dunaliella and other members of the Chlorophyta, but may replace it by the alternative xanthophyll cycle lutein ⇌ lutein 5,6-epoxide. It is concluded that, in the absence of taxonomic misidentification, unpredictable xanthophyll differences may occur among geographically different clones or variants of the same algal species or members of the same algal genus.Read More
Publication Year: 1983
Publication Date: 1983-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 7
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