Download Carotenoids in Photosynthesis by G. Britton (auth.), Dr. Andrew J. Young, Dr. George Britton PDF

By G. Britton (auth.), Dr. Andrew J. Young, Dr. George Britton (eds.)

Significant advancements lately have ended in a deeper knowing of the function and serve as of carotenoids in photosynthesis. For the 1st time the organic, biochemical, and chemical facets of the position of those pigments in photosynthesis are introduced jointly in a single accomplished reference quantity. Chapters concentrate on the photochemistry of carotenoids in gentle harvesting and photoprotection, the character and distribution of carotenoids in photosynthetic organisms, their biosynthesis, the herbicidal inhibition of carotenogenesis and the `xanthophyll cycle'. all through info are given of some of the methodologies used. a close appendix offers actual info for the main compounds. Carotenoids in Photosynthesis is a useful reference resource for all plant scientists.

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E. devoid of possible contamination from other algal species, have been established by 1H -NMR and circular dichroism (CD) (Bj0mland et al. 1986). J. Young Carotenoid epoxides have rarely been reported for the red algae (Goodwin 1980) although some Rhodophycean algae do appear to be able to synthesise antheraxanthin and lutein-5,6-epoxide (= taraxanthin) (Bj0mland et al. 1984a; Czeczuga and Taylor 1987). Other species appear to lack a-carotene and its xanthophyll derivatives such as lutein (Guillard et al.

16 Carotenoids of the Phaeophyceae Major Others B-Carotene (1) Fucoxanthin (S2) Violaxanthin (3) Antheraxanthin (S) E-Carotene (S6) Diadinoxanthin (38) Diatoxanthin (39) Fucoxanthinol (71) Neoxanthin (4) Zeaxanthin (6) Liaaen-Jensen (1990) has recently reported that the neoxanthin present in Fucus serratus is the all-trans isomer. This is in contrast to some other algae and the Occurrence and distribution 49 majority of higher plants where 9'-cis neoxanthin appears to be the natural isomer in photosynthetic tissues (the all-trans isomer ofneoxanthin is commonly found in non-photosynthetic tissues of higher plants).

17 Carotenoids of the Cyanobacteria Caloxanthin (79) Canthaxanthin (32) B-Carotene (1) B-Cryptoxanthin (9) Echinenone (30) Myxoxanthophyll (77) Nostoxanthin (80) Oscillaxanthin (78) Zeaxanthin (6) Riesen et al. (1984) described a species of Spirulina which possessed myxol and oscillol a-bound to L-chivonose and L-fucose rather than rhamnose, as suggested above. Foss et al. (1986b) further examined the glycosidic carotenoids of a number of filamentous cyanobacteria and reported an a-bound chivonose moiety for both myxoxanthophyll and oscillaxanthin in Oscillatoria agardhii and an Arthrospora species.

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