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Pigment and quinone content of two photosynthetic barley mutants
Author(s) -
Grumbach K. H.
Publication year - 1985
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1985.tb04263.x
Subject(s) - neoxanthin , hordeum vulgare , mutant , wild type , chlorophyll , carotenoid , biology , photosynthesis , violaxanthin , biochemistry , chloroplast , chlorophyll b , lutein , botany , zeaxanthin , poaceae , gene
The pigment and quinone content of wild‐type barley ( Hordeum vulgare L., cv. Svalöfs Bonus) and of two photosynthetic mutants was assayed. Wild type plants and the photosystem Hacking mutant viridis zb63 contained chlorophyll a and b. whereas chlorina‐f2 contained only chlorophyll a The inability of the mutant chlorina‐f2 to convert chlorophyll a into chlorophyll a appears to he the primary effect of the mutation. In both mutants, the carotenoid composition was virtually identical to that of the wild type. As compared to the wild type. chlorina‐f2 contained less lutein and neoxanthin. The mutant viridis‐zb63 contained less β‐carotene but more antheraxanthin and xeaxanthin than the wild type. The quinone content and composition of the wild type and the photosynthetic mutants was similar, and both mutants biosynthesized plastid quinones and chromanols starting from [14C]‐labeled tyrosine. The data indicate that carotenoid and quinone biosynthesis are not altered in the two mutants as compared to the wild type.