Plant Physiol. Illumina
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Plant Physiology 53:728-731 (1974)
© 1974 American Society of Plant Biologists

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Phenolic Acids in Wheat Coleoptile Cell Walls 1

F. W. Whitmore

a Department of Forestry, Ohio Agricultural Research and Development Center, Wooster, Ohio 44691

The phenolic constituent of nonvascular cell walls of wheat (Triticum aestivum L.) coleoptiles, which yields vanillin upon nitrobenzene oxidation, is not lignin as I previously claimed. It seems to be mainly ferulic acid bonded to carbohydrate, probably by an ester linkage. The acid is associated with a fraction of the wall rich in arabinose and xylose, although it is not known whether it is esterified directly with these pentose residues. The phenolic-carbohydrate complex is released by cellulase, but not by pronase or a mixture of hemicellulases.

1 Ohio Agricultural Research and Development Center Journal Paper No. 86-73.






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