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Grodzinski B, Boesel I, Horton RF. Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L. Plant Physiol. 1983;71(3):588-93doi: 10.1104/pp.71.3.588.
Grodzinski, B., Boesel, I., & Horton, R. F. (1983). Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L. Plant physiology, 71(3), 588-93. https://doi.org/10.1104/pp.71.3.588
Grodzinski, B, et al. "Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L." Plant physiology vol. 71,3 (1983): 588-93. doi: https://doi.org/10.1104/pp.71.3.588
Grodzinski B, Boesel I, Horton RF. Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L. Plant Physiol. 1983 Mar;71(3):588-93. doi: 10.1104/pp.71.3.588. PMID: 16662871; PMCID: PMC1066082.
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Plant Physiol. 1983 Mar;71(3):588-93. doi: 10.1104/pp.71.3.588.

Light Stimulation of Ethylene Release from Leaves of Gomphrena globosa L.

Plant physiology

B Grodzinski, I Boesel, R F Horton

Affiliations

  1. Department of Horticultural Science, University of Guelph, Guelph, Ontario N1G 2W1 Canada.

PMID: 16662871 PMCID: PMC1066082 DOI: 10.1104/pp.71.3.588

Abstract

The effect of light and CO(2) on both the endogenous and 1-aminocyclopropane-1-carboxylic acid (ACC)-dependent ethylene evolution from metabolically active detached leaves and leaf discs of Gomphrena globosa L. is reported. Treatment with varying concentrations of ACC did not appear to inhibit photosynthesis, respiration, or stomatal behavior. In all treatments, more ethylene was released into a closed flask from ACC-treated tissue, but the pattern of ethylene release with respect to light/dark/CO(2) treatments was the same.Leaf tissue in the light with a source of CO(2) sufficient to maintain photosynthesis always generates 3 to 4 times more ethylene than tissue in the dark. Conversely, the lowest rate of ethylene release occurs when leaf tissue is illuminated and photosynthetic activity depletes the CO(2) to the compensation point. Ethylene release in the dark is also stimulated by CO(2) either added to the flask as bicarbonate or generated by dark respiration. Ethylene release increases dramatically and in parallel with photosynthesis at increasing light intensities in this C(4) plant. Ethylene release appears dependent on CO(2) both in the light and in the dark. Therefore, it is suggested that the important factor regulating the evolution of ethylene gas from leaves of Gomphrena may be CO(2) metabolism rather than light per se.

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