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Multiple Forms of Amylase Induced by Gibberellic Acid in Isolated Barley Aleurone Layers ¹

Division of Plant Industry, Commonwealth Scientific and Industrial Research Organization, Canberra, Australia Capital Territory, Australia, Michigan State University-Atomic Energy Commission Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48823

The addition of gibberellic acid to isolated aleurone layers of barley (Hordeum vulgare L.) causes the production and secretion of four -amylases. Two of these are stable at pH 3.7 and are not inactivated by ethylenediaminetetraacetate. The other two represent the classical barley -amylases; i.e., they are inactivated at pH 3.7 and by reagents which from complexes with divalent metal ions. All four forms are synthesized de novo in response to the addition of gibberellic acid.

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				S. Ritchie, A. McCubbin, G. Ambrose, T.-h. Kao, and S. Gilroy The Sensitivity of Barley Aleurone Tissue to Gibberellin Is Heterogeneous and May Be Spatially Determined Plant Physiology, June 1, 1999; 120(2): 361 - 370. [Abstract] [Full Text]