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Plant Physiology 82:685-687 (1986)
© 1986 American Society of Plant Biologists

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Articles

Comparison of IAA-Induced and Low Temperature-Induced GA3 Responsiveness and {alpha}-Amylase Production by GA3 Insensitive Dwarf Wheat Aleurone 1

Surinder P. Singh2 and Leslie G. Paleg

Department of Plant Physiology, Waite Agricultural Research Institute, University of Adelaide, Glen Osmond, S.A., 5064, Australia

Rht3-containing gibberellic acid (GA3) insensitive deembryonated wheat (Triticum aestivum L. var Cappelle Desprez x Minister Dwarf) aleurone, that can be made responsive to GA3 by low temperature, can also be rendered GA3 sensitive by preincubation with indoleacetic acid (IAA). The IAA-induced response of the dwarf selection is concentration-dependent, relatively sensitive, and similar in magnitude to that induced by low temperature. Other auxins also induce GA3 responsiveness to a greater or lesser degree. IAA has no apparent effect on the wild type (rht, tall) selection.

2 Present address: Department of Surgery, University of Queensland, Repatriation General Hospital, Greenslopes, Australia, Q'1d, 4120.

1 Supported by a University of Adelaide Postgraduate Scholarship to S. P. Singh and generous and timely financial assistance from Commonwealth Scientific and Industrial Research Organization.






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Copyright © 1986 by the American Society of Plant Biologists