Plant Physiol.
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Plant Physiology 42:1596-1600 (1967)
© 1967 American Society of Plant Biologists

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Articles

Gibberellic Acid-Induced Synthesis of Protease by Isolated Aleurone Layers of Barley 1

John V. Jacobsen2 and J. E. Varner

MSU/AEC Plant Research Laboratory, Michigan State University East Lansing, Michigan 48823

The production of protease by isolated aleurone layers of barley in response to gibberellic acid has been examined. The protease arises in the aleurone layer and is mostly released from the aleurone cells. The courses of release of amylase and protease from aleurone layers, the dose responses to gibberellic acid and the effects of inhibitors on the production of both enzymes are parallel. As is the case for amylase, protease is made de novo in response to the hormone. These data give some credence to the hypothesis that the effect of gibberellic acid is to promote the simultaneous synthesis and secretion of a group of hydrolases.

2 Present address: Division of Plant Industry, C.S.I.R.O., Canberra, A.C.T., Australia.

1 This work was supported by the United States Atomic Energy Commission under contract No. AT (11-1) 1338.




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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1967 by the American Society of Plant Biologists