Ferulic acid is esterified to glucuronoarabinoxylans in pineapple cell walls.
The ester-linkage of ferulic acid (mainly E) to polysaccharides in primary cell walls of pineapple fruit (Ananas comosus) (Bromeliaceae) was investigated by treating a cell-wall preparation with 'Driselase' which contains a mixture of endo- and exo-glycanases, but no hydroxycinnamoyl esterase activity. The most abundant feruloyl oligosaccharide released was O-[5-O-(E-feruloyl)-alpha-L-arabinofuranosyl](1-->3)-O-beta-D-xylopyranosyl-(1-->4)-D-xylopyranose (FAXX). This indicated that the ferulic acid is ester-linked to glucuronoarabinoxylans in the same way as in the primary walls of grasses and cereals (Poaceae). Glucuronoarabinoxylans are the major non-cellulosic polysaccharides in the pineapple cell walls.
School of Biological Sciences, The University of Auckland, New Zealand.
B G
BG
Smith
P J
PJ
Harris
D002240:Carbohydrate Sequence; D002473:Cell Wall / Q000378:metabolism*; D003373:Coumaric Acids / Q000378:metabolism*; D004951:Esterification; D005638:Fruit / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014990:Xylans / Q000737:chemistry / Q000378:metabolism*
D003373:Coumaric Acids; D014990:Xylans; C114470:glucuronoarabinoxylan; C004999:ferulic acid