Abstract
Cotyledons of cotton (Gossypium hirsutum L.) seedlings grown under a photoperiod of 12 hour darkness and 12 hour light showed daily oscillations in ethylene evolution. The rate of ethylene evolution began to increase toward the end of the dark period and reached a maximum rate during the first third of the light period, then it declined and remained low until shortly before the end of the dark period. The oscillations in ethylene evolution occurred in young, mature, and old cotyledons (7 to 21 day old). These oscillations in ethylene evolution seemed to be endogenously controlled since they continued even when the photoperiod was inverted. Moreover, in continuous light the oscillations in ethylene evolution persisted, but with shorter intervals between the maximal points of ethylene evolution. In continuous darkness the oscillations in ethylene evolution disappeared. The conversion of [3,4-14C]methionine into [14C] ethylene followed the oscillations in ethylene evolution in the regular as well as the inverted photoperiod. On the other hand, the conversion of applied 1-aminocyclopropane-1-carboxylic acid into ethylene did not follow the oscillations in ethylene evolution, but was affected directly by the light conditions. Always, light decreased and darkness increased the conversion of applied 1-aminocyclopropane-1-carboxylic acid into ethylene. It is concluded that in the biosynthetic pathway of ethylene the conversion of 1-aminocyclopropane-1-carboxylic acid into ethylene is directly affected by light while an earlier step is controlled by an endogenous rhythm.
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Selected References
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- Adams D. O., Yang S. F. Ethylene biosynthesis: Identification of 1-aminocyclopropane-1-carboxylic acid as an intermediate in the conversion of methionine to ethylene. Proc Natl Acad Sci U S A. 1979 Jan;76(1):170–174. doi: 10.1073/pnas.76.1.170. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Aharoni N., Lieberman M. Patterns of ehtylene production in senescing leaves. Plant Physiol. 1979 Nov;64(5):796–800. doi: 10.1104/pp.64.5.796. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bassi P. K., Spencer M. S. Effect of carbon dioxide and light on ethylene production in intact sunflower plants. Plant Physiol. 1982 May;69(5):1222–1225. doi: 10.1104/pp.69.5.1222. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Grodzinski B., Boesel I., Horton R. F. Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L. Plant Physiol. 1983 Mar;71(3):588–593. doi: 10.1104/pp.71.3.588. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lipe J. A., Morgan P. W. Ethylene, a regulator of young fruit abscission. Plant Physiol. 1973 May;51(5):949–953. doi: 10.1104/pp.51.5.949. [DOI] [PMC free article] [PubMed] [Google Scholar]