The flavonoids in leaves of diploidTriticum species (Gramineae) |
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Authors: | Jeffrey B Harborne Marian Boardley Sune Fröst Gerhard Holm |
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Institution: | (1) Botany Department, University of Reading, RG6 2AS Reading, England, U.K.;(2) Institute of Genetics, University of Lund, Lund, Sweden |
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Abstract: | Leaf flavonoids have been identified in seven species ofTriticum, all of which have been considered at one time as putative parents of the cultivated tetraploid and hexaploid wheats. The major constituents are apigenin- and luteolin-based glycosylflavones, some of which contain various O-glycosidic attachments at the 6 -position. Four tricin glycosides are present in minor amount, as is free tricin. The flavonoid patterns link togetherT. searsii, T. speltoides andT. squarrosa, on the one hand, andT. monococcum, T. boeoticum, T. thaoudar andT. urartu, on the other. These results indicate that the first three taxa are more likely to be diploid ancestors to the hexaploidT. aestivum than the latter four species. |
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Keywords: | Angiosperms Gramineae Triticum Leaves tricin derivatives schaftoside iso-orientin O-glycosides chemosystematics origin of bread wheat |
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