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Plant Physiology 43:1255-1258 (1968)
© 1968 American Society of Plant Biologists

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Abscission: The Role of Ethylene, Ethylene Analogues, Carbon Dioxide, and Oxygen

F. B. Abeles and H. E. Gahagan, III

Plant Sciences Laboratory, Fort Detrick, Frederick, Maryland 21701

Ethylene was the most effective abscission accelerant examined, with decreasing activity shown by propene, carbon monoxide, acetylene, vinyl fluoride, 1-butene, and 1,3-butadiene. Carbon dioxide inhibited abscission, but its effect was overcome by ethylene. Oxygen was required for abscission as an electron acceptor for respiration and not as a potentiator or activator of the ethylene attachment site. The molecular requirements for abscission were similar to those shown by other workers for other biological processes under the influence of ethylene.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1968 by the American Society of Plant Biologists