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Plant Physiology 49:187-189 (1972)
© 1972 American Society of Plant Biologists

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Articles

Characteristics of the Process of Enzyme Release from Secretory Plant Cells 1

J. E. Varner and Rose M. Mense

a Michigan State University-Atomic Energy Commission Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48823

Secretion—the outward movement of molecules across the plasmalemma—of {alpha}-amylase by barley (Hordeum vulgare L. cv. Himalaya) aleurone layers is an energy-dependent process that is not directly dependent upon protein synthesis or RNA synthesis and does not appear to be under the direct control of gibberellic acid or abscisic acid. Release—the movement of the secreted {alpha}-amylase molecules through the walls into the surrounding medium—is apparently diffusion limited and is markedly dependent upon the presence of ions.

1 This research was supported by the United States Atomic Energy Commission (Contract AT(11-1)-1338) and by a grant from the National Science Foundation (GB-8774).






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Copyright © 1972 by the American Society of Plant Biologists