Abstract
Excised apical segments of etiolated rice (Oryza sativa L.) coleoptiles produced ethylene. Increasing the number of cut sites per coleoptile increased the rate of ethylene formation. Ethylene produced by an etiolated-intact seedling in the dark was about a half of that by the excised coleoptile segment. Red light of low energy as well as of continuous irradiation inhibited the production of ethylene. The inhibition by a low energy dose of red light was partly relieved, if the red light was followed immediately by a small dose of far red light. The effect of red and far red light was repeatedly reversible, indicating that ethylene production was regulated by a phytochrome system. If the exposure to far red light was preceded by a period of darkness, this photoreversibility disappeared; 50% of the initial reversibility was lost within 5 hours. Applied ethylene (10 microliters per liter) significantly promoted the growth of intact coleoptiles of either totally etiolated or red light-treated seedlings, but had no effect on the excised apical segment of coleoptile.
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Selected References
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- Abeles F. B. Inhibition of Flowering in Xanthium pensylvanicum Walln. by Ethylene. Plant Physiol. 1967 Apr;42(4):608–609. doi: 10.1104/pp.42.4.608. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Furuya M., Pjon C. J., Fujii T., Ito M. Phytochrome action in Oryza sativa L. 3. The separation of photoperceptive site and growing zone in coleoptiles, and auxin transport as effector system. Dev Growth Differ. 1969 Jun;11(1):62–76. doi: 10.1111/j.1440-169x.1969.00062.x. [DOI] [PubMed] [Google Scholar]
- Goeschl J. D., Pratt H. K., Bonner B. A. An effect of light on the production of ethylene and the growth of the plumular portion of etiolated pea seedlings. Plant Physiol. 1967 Aug;42(8):1077–1080. doi: 10.1104/pp.42.8.1077. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Goeschl J. D., Rappaport L., Pratt H. K. Ethylene as a factor regulating the growth of pea epicotyls subjected to physical stress. Plant Physiol. 1966 May;41(5):877–884. doi: 10.1104/pp.41.5.877. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kang B. G., Yocum C. S., Burg S. P., Ray P. M. Ethylene and carbon dioxide: mediation of hypocotyl hook-opening response. Science. 1967 May 19;156(3777):958–959. doi: 10.1126/science.156.3777.958. [DOI] [PubMed] [Google Scholar]