Abstract
Application of kinetin and Ca2+ caused a striking synergistic increase in ethylene production by mung bean (Phaseolus aureus Roxb) hypocotyl segments. The effect of kinetin on Ca2+ uptake and of Ca2+ on the uptake and metabolism of kinetin in relation to their effect on ethylene production was studied. Tracer experiments showed that kinetin greatly increased the uptake of 45Ca2+ after 6 hours of incubation. Reciprocally, Ca2+ stimulated the uptake of kinetin-8-14C and remarkably enhanced the metabolism of kinetin-8-14C into several polar metabolites. Consequently, the quantity of free kinetin-8-14C remaining in Ca2+-treated segments was much less than in control segments. A possible mechanism accounting for the synergism between kinetin and calcium on ethylene production is discussed.
Full text
PDF


Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Burg S. P., Burg E. A. Ethylene formation in pea seedlings; its relation to the inhibition of bud growth caused by indole-3-acetic Acid. Plant Physiol. 1968 Jul;43(7):1069–1074. doi: 10.1104/pp.43.7.1069. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Chrispeels M. J., Varner J. E. Gibberellic Acid-enhanced synthesis and release of alpha-amylase and ribonuclease by isolated barley and aleurone layers. Plant Physiol. 1967 Mar;42(3):398–406. doi: 10.1104/pp.42.3.398. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Deleuze G. G., McChesney J. D., Fox J. E. Identification of a stable cytokinin metabolite. Biochem Biophys Res Commun. 1972 Sep 26;48(6):1426–1432. doi: 10.1016/0006-291x(72)90872-8. [DOI] [PubMed] [Google Scholar]
- Dyson W. H., Fox J. E., McChesney J. D. Short term metabolism of urea and purine cytokinins. Plant Physiol. 1972 Apr;49(4):506–513. doi: 10.1104/pp.49.4.506. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fox J. E. Incorporation of a kinin, N, 6-benzyladenine into soluble RNA. Plant Physiol. 1966 Jan;41(1):75–82. doi: 10.1104/pp.41.1.75. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kang B. G., Newcomb W., Burg S. P. Mechanism of Auxin-induced Ethylene Production. Plant Physiol. 1971 Apr;47(4):504–509. doi: 10.1104/pp.47.4.504. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lau O. L., Yang S. F. Mechanism of a Synergistic Effect of Kinetin on Auxin-induced Ethylene Production: Suppression of Auxin Conjugation. Plant Physiol. 1973 Jun;51(6):1011–1014. doi: 10.1104/pp.51.6.1011. [DOI] [PMC free article] [PubMed] [Google Scholar]
- LeJohn H. B., Cameron L. E. Cytokinins regulate calcium binding to a glycoprotein from fungal cells. Biochem Biophys Res Commun. 1973 Oct 1;54(3):1053–1060. doi: 10.1016/0006-291x(73)90800-0. [DOI] [PubMed] [Google Scholar]
- LeJohn H. B., Stevenson R. M. Cytokinins and magnesium ions may control the flow of metabolites and calcium ions through fungal cell membranes. Biochem Biophys Res Commun. 1973 Oct 1;54(3):1061–1066. doi: 10.1016/0006-291x(73)90801-2. [DOI] [PubMed] [Google Scholar]
- Poovaiah B. W., Leopold A. C. Inhibition of abscission by calcium. Plant Physiol. 1973 May;51(5):848–851. doi: 10.1104/pp.51.5.848. [DOI] [PMC free article] [PubMed] [Google Scholar]
- TAKAGI T., ISEMURA T. NECESSITY OF CALCIUM FOR THE RENATURATION OF REDUCED TAKA-AMYLASE A. J Biochem. 1965 Jan;57:89–95. doi: 10.1093/oxfordjournals.jbchem.a128062. [DOI] [PubMed] [Google Scholar]