Abstract
Four growth-influencing compounds—hydroxyproline, 2,2′-dipyridyl, 2-chloroethylphosphonic acid, and indoleacetic acid—were used to examine the relationship between lignin formation and growth of wheat coleoptile sections. Hydroxyproline and 2-chloroethylphosphonic acid, at low concentrations, inhibited growth and increased lignin content. Dipyridyl, which promoted coleoptile elongation, decreased lignin content. Indoleacetic acid caused a 300% increase in growth at 0.1 mm but resulted in lignin content no different from controls with no auxin. Chemical and anatomical evidence is given which indicates that lignin is present in the epidermal cell walls of the wheat coleoptile. It is thus possible that bonding between lignin and hemicellulose may have some influence on coleoptile growth.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Baker D. B., Ray P. M. Direct and Indirect Effects of Auxin on Cell Wall Synthesis in Oat Coleoptile Tissue. Plant Physiol. 1965 Mar;40(2):345–352. doi: 10.1104/pp.40.2.345. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cleland R., Karlsnes A. M. A possible role of hydroxyproline-containing proteins in the cessation of cell elongation. Plant Physiol. 1967 May;42(5):669–671. doi: 10.1104/pp.42.5.669. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Warner H. L., Leopold A. C. Ethylene evolution from 2-chloroethylphosphonic Acid. Plant Physiol. 1969 Jan;44(1):156–158. doi: 10.1104/pp.44.1.156. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Whitmore F. W. Effect of indoleacetic Acid and hydroxyproline on isoenzymes of peroxidase in wheat coleoptiles. Plant Physiol. 1971 Feb;47(2):169–171. doi: 10.1104/pp.47.2.169. [DOI] [PMC free article] [PubMed] [Google Scholar]