Abstract
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.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Painter T. J., Neukom H. The mechanism of oxidative gelation of a glycoprotein from wheat flour. Evidence from a model system based upon caffeic acid. Biochim Biophys Acta. 1968 Jun 24;158(3):363–381. doi: 10.1016/0304-4165(68)90291-2. [DOI] [PubMed] [Google Scholar]
- Stafford H. A. Comparison of Lignin-like Products Found Naturally or Induced in Tissues of Phleum, Elodea, and Coleus, and in a Paper Perioxidase System. Plant Physiol. 1964 May;39(3):350–360. doi: 10.1104/pp.39.3.350. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Whitmore F. W. Lignin formation in wheat coleoptile cell walls: a possible limitation of cell growth. Plant Physiol. 1971 Nov;48(5):596–602. doi: 10.1104/pp.48.5.596. [DOI] [PMC free article] [PubMed] [Google Scholar]