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p‐Coumaric and ferulic acid components of cell walls of ryegrass and their relationships with lignin and digestibility
Author(s) -
Hartley R. D.
Publication year - 1972
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740231110
Subject(s) - perennial plant , ferulic acid , lignin , vanillin , cell wall , chemistry , p coumaric acid , coumaric acid , lolium perenne , food science , botany , agronomy , biology , biochemistry , organic chemistry
Cell walls, isolated from vegetative Italian ryegrass, pre‐ and post‐flowering perennial ryegrass and the faeces of sheep fed the perennial ryegrass, were treated with alkali and the liberated p ‐coumaric acid (PCA), ferulic acid (FA) and vanillin estimated. A higher yield of the two acids was obtained from the Italian than from the perennial ryegrass. Oxidation of the cell‐wall residues indicated the presence of the 1‐phenylpropene structural unit in the lignin cores. There was a highly significant correlation between the digestibility of the cell walls from perennial ryegrass and the FA/PCA ratio. The recovery of PCA (24 to 59 %) from the faecal cell walls was much higher than that of FA (5 to 21 %). For each acid this recovery was lower in the pre‐flowering herbage.