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Plant Physiology 63:677-679 (1979)
© 1979 American Society of Plant Biologists

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Effect of Ethylene on Plasma Membrane Density in Kidney Bean Abscission Zones 1

Don E. Koehler2 and Lowell N. Lewis

a Department of Plant Sciences, University of California, Riverside, California 92521

Plasma membranes from abscission zones of kidney bean seedlings were isolated on sucrose density gradients using cellulase and KCl-stimulated ATPase as marker enzymes. Following treatment of the seedling explants with 50 microliters per liter ethylene, an increase in the buoyant density of the plasma membrane fraction from 1.165 to 1.175 grams per cubic centimeter was observed. Such a change is consistent with the loss of lipids from the senescent cells of the abscission zone.

2 Present address: Department of Plant Sciences, Texas A&M University, College Station, Texas 77843.

1 This research was supported by National Science Foundation Grant BMS 74-19986.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1979 by the American Society of Plant Biologists