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. 1973 Jun;51(6):1011–1014. doi: 10.1104/pp.51.6.1011

Mechanism of a Synergistic Effect of Kinetin on Auxin-induced Ethylene Production

Suppression of Auxin Conjugation 1

Oi-Lim Lau a, S F Yang a
PMCID: PMC366394  PMID: 16658455

Abstract

In hypocotyl segments of mung bean (Phaseolus mungo L.) seedlings, exogenously supplied indoleacetic acid was rapidly conjugated mainly into indoleacetylaspartic acid, which was inactive in inducing ethylene production. Kinetin is known to stimulate indoleacetic acid-induced ethylene production. The mechanism of kinetin action on indoleacetic acid-induced ethylene production by hypocotyl segments of mung bean seedlings was studied in relation to indoleacetic acid uptake and indoleacetic acid metabolism. Kinetin enhanced indoleacetic acid uptake during the initial 2-hour incubation and markedly suppressed the conversion of indoleacetic acid to indoleacetic acid conjugates throughout the whole 7-hour incubation. As a result, there was more free indoleacetic acid and less conjugated indoleacetic acid in the segments treated with kinetin than in those receiving no kinetin. A close relationship was demonstrated between the rate of ethylene production and the level of free indoleacetic acid, which was regulated by kinetin.

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Selected References

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

  1. Abeles F. B. Auxin stimulation of ethylene evolution. Plant Physiol. 1966 Apr;41(4):585–588. doi: 10.1104/pp.41.4.585. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Abeles F. B., Rubinstein B. Regulation of Ethylene Evolution and Leaf Abscission by Auxin. Plant Physiol. 1964 Nov;39(6):963–969. doi: 10.1104/pp.39.6.963. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. 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]
  4. Burg S. P., Burg E. A. The interaction between auxin and ethylene and its role in plant growth. Proc Natl Acad Sci U S A. 1966 Feb;55(2):262–269. doi: 10.1073/pnas.55.2.262. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Chadwick A. V., Burg S. P. Regulation of root growth by auxin-ethylene interaction. Plant Physiol. 1970 Feb;45(2):192–200. doi: 10.1104/pp.45.2.192. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Fuchs Y., Lieberman M. Effects of Kinetin, IAA, and Gibberellin on Ethylene Production, and Their Interactions in Growth of Seedlings. Plant Physiol. 1968 Dec;43(12):2029–2036. doi: 10.1104/pp.43.12.2029. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. 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]
  8. Osborne D. J. Effect of Kinetin on Protein & Nucleic Acid Metabolism in Xanthium Leaves During Senescence. Plant Physiol. 1962 Sep;37(5):595–602. doi: 10.1104/pp.37.5.595. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Shibaoka H., Thimann K. V. Antagonisms between Kinetin and Amino Acids: Experiments on the Mode of Action of Cytokinins. Plant Physiol. 1970 Aug;46(2):212–220. doi: 10.1104/pp.46.2.212. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Srivastava B. I., Ware G. The effect of kinetin on nucleic acids and nucleases of excised barley leaves. Plant Physiol. 1965 Jan;40(1):62–64. doi: 10.1104/pp.40.1.62. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. VonAbrams G. J., Pratt H. K. Effect of the kinetin-naphthaleneacetic acid interaction upon total RNA and protein in senescing detached leaves. Plant Physiol. 1968 Aug;43(8):1271–1278. doi: 10.1104/pp.43.8.1271. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Yang S. F., Ku H. S., Pratt H. K. Photochemical production of ethylene from methionine and its analogues in the presence of flavin mononucleotide. J Biol Chem. 1967 Nov 25;242(22):5274–5280. [PubMed] [Google Scholar]

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