Skip to main content
NCBI home page
Plant Physiology logoLink to Plant Physiology
. 1973 Apr;51(4):714–717. doi: 10.1104/pp.51.4.714

The Role of Light and Growth Regulators in the Opening of the Dentaria Petiolar Hook

J H Yopp 1
PMCID: PMC366333  PMID: 16658397

Abstract

The phenomenon of the etiolated hook is not restricted to the hypocotyl of the dicotyledenous plant (e.g., Phaseolus) but appears to serve a similar, adaptive function in the petioles of certain rhizomatous plants. The commonly employed regulants of hypocotyl hook opening were tested for their effect on the petiolar hook of Dentaria diphylla. The hook was found to require both light (red light promoted, far red inhibited) and the intact leaf for opening. The leaf requirement was fully replaced by gibberellic acid (0.04% in lanolin) but only in light; cobalt chloride (0.1-1.0 mm) promoted a partial opening in dark with or without leaf; and coumarin (1 mm), indoleacetic acid (1-4% in lanolin), and ethylene 10 microliter per liter all inhibited opening of hooks with or without lamina. The absolute requirement for light and leaf tissue and the replacement of proximal tissue by GA3 alone represent marked differences in the physiology of hypocotyl and petiolar hooks. These differences are believed to indicate the necessity for concomitant leaf maturation in petiolar hook opening.

Full text

PDF
714

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. BRIAN P. W. Role of gibberellin-like hormones in regulation of plant growth & flowering. Nature. 1958 Apr 19;181(4616):1122–1123. doi: 10.1038/1811122a0. [DOI] [PubMed] [Google Scholar]
  2. Dennis D. T., Upper C. D., West C. A. An enzymic site of inhibition of gibberellin biosynthesis by Amo 1618 and other plant growth retardants. Plant Physiol. 1965 Sep;40(5):948–952. doi: 10.1104/pp.40.5.948. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Downs R. J. Photoreversibility of Leaf and Hypocotyl Elongation of Dark Grown Red Kidney Bean Seedlings. Plant Physiol. 1955 Sep;30(5):468–473. doi: 10.1104/pp.30.5.468. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Klein W. H., Withrow R. B., Elstad V. B. Response of the Hypocotyl Hook of Bean Seedlings to Radiant Energy and Other Factors. Plant Physiol. 1956 Jul;31(4):289–294. doi: 10.1104/pp.31.4.289. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Köhler D., Lang A. Evidence for Substances in Higher Plants Interfering with Response of Dwarf Peas to Gibberellin. Plant Physiol. 1963 Sep;38(5):555–560. doi: 10.1104/pp.38.5.555. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Liverman J. L., Johnson M. P., Starr L. Reversible Photoreaction Controlling Expansion of Etiolated Bean-Leaf Disks. Science. 1955 Mar 25;121(3143):440–441. doi: 10.1126/science.121.3143.440. [DOI] [PubMed] [Google Scholar]
  7. Powell R. D., Morgan P. W. Factors involved in the opening of the hypocotyl hook of cotton and beans. Plant Physiol. 1970 May;45(5):548–552. doi: 10.1104/pp.45.5.548. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Rubinstein B. Auxin and red light in the control of hypocotyl hook opening in beans. Plant Physiol. 1971 Aug;48(2):187–192. doi: 10.1104/pp.48.2.187. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Plant Physiology are provided here courtesy of Oxford University Press

RESOURCES