Cell wall-conjugated phenolics from coniferae leaves

Abstract

The occurrence of insoluble conjugated (ester-bound) hydroxycinnamic acids (p-coumaric and ferulic acids) and flavonol glycosides (kaempferol 3-O-β-glucopyranoside and 3-O-α-rhamnopyranoside, and quercetin 3-O-β-glucopyranoside and 3-O-α-arabinofuranoside) in cell wall preparations from leaves of 54 species from various Conifer taxa has been investigated. the bound β-coumaric and ferulic acids seem to be widespread among members of the Coniferae-with β-coumaric acid as the major compounds in most species investigated-, while the presence of bound flavonol glycosides appears to be of chemotaxonomic relevance for members of the Pinaceae. The Pinaceae species generally gave kaempferol 3-O-glucoside, although Abies gave in addition kaempferol 3-O-rhamnoside and Pinus quercetin 3-0-glucoside and 3-O-arabinoside. © 1988.