The Biochemical Systematics of Flavonoids

Characterization of TwoO.-Methyltransferase-like Genes in Barley and Maize

“…These results indicate that there exists a flavone-specific OMT gene family in cereal grain plants as well as other monocot species, all of which accumulate variable amounts of tricin (Harborne, 1975). The gene products of this family use tricetin as their preferred substrate, although they also accept luteolin to a lower extent.…”

“…1). It was first isolated from wheat (Anderson, 1932), and has been detected in 91% of 118 species tested in the Graminae and in almost 50% of the species examined from both the Cyperaceae and Palmae (Harborne, 1975). We have recently isolated and characterized the flavone-specific OMTs of wheat (Zhou et al, 2006a) and rice (Zhou et al, 2006b), both of which use the pentahydroxyflavone tricetin (Fig.…”

Chemotaxonomic studies in the Rubiaceae 1. Methods for the identification of hybridisation in the genusCoprosmaJ.R. et G. Forst. using flavonoids

“…The principle of additivity has been found very useful in hybrid studies in numerous genera (for reviews see Turner 1967, andHarborne 1975), but not universally so; Str!<imnaes & Garber (1963) could not detect Collinsia F\ hybrids using flavonoid patterns even when the parental types possessed different chromatographic profiles. Taylor (1964) carried out a preliminary chromatographic examination of unidentified polyphenolic aglycones from Coprosma robusta, C. propinqua var.…”

Phytochemical and genetical variability of species from section Serpyllum (Mill.) Benth. genus Thymus L. (Lamiaceae) in Serbia

“…Kvercetagetin je nešto manje rasprostranjen, detektovan je kod oko 8 familija. Oba tipa ţutih flavonola prisutna su u dve velike familije cvetnica, Asteraceae i Fabaceae (Harborne, 1975).…”

“…Upravo ĉesta hibridizacija i odsustvo morfoloških karaktera po kojima bi se hibridi razlikovali je uzrok mnogih teškoća u taksonomiji ove familije, s toga je moguće traţiti odgovore primenom biohemijske taksonomije. Nekoliko ekstenzivnih studija flavonoida ukazuje da su ovi sekundarni metaboliti kod cvetnica najefikasniji u prouĉavanju taksonomije na nivou roda i unutar roda (Markham i sar., 1970;Swain, 1975;Harborne, 1975Harborne, , 1977Harborne, , 1984Greger, 1978;Gurni i Kubitzki, 1981;Young i Sterner, 1981).…”