Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 100:1834-1839 (1992)
© 1992 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Schuurink, R. C.
Right arrow Articles by Wang, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Schuurink, R. C.
Right arrow Articles by Wang, M.
Agricola
Right arrow Articles by Schuurink, R. C.
Right arrow Articles by Wang, M.
Metabolism and Enzymology

Dormancy of the Barley Grain Is Correlated with Gibberellic Acid Responsiveness of the Isolated Aleurone Layer

Robert C. Schuurink, Norbert J. A. Sedee and Mei Wang

Center for Phytotechnology, Rijksuniversiteit Leiden-Netherlands Organization for Applied Scientific Research, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands, Department of Molecular Plant Biotechnology, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands

The relationship between barley grain dormancy and gibberellic acid (GA3) responsiveness of aleurone layers has been investigated. Barley (Hordeum distichum L. cvs Triumph and Kristina) grains were matured under defined conditions in a phytotron. Grains of Triumph plants grown under long-day/warm conditions had lower dormancy levels than grains of plants grown under short-day/cool conditions. Aleurone layers isolated from grains of long-day Triumph plants secreted more {alpha}-amylase and had a higher responsiveness to GA3 as measured by {alpha}-amylase secretion. Storage of the grains increased both the percentage of germination and the responsiveness of the aleurone to GA3. Use of different sterilization methods to break dormancy confirmed the correlation between germination percentage and aleurone layer GA3 responsiveness. The response of embryoless Triumph grains to GA3 was lower than that of the isolated aleurone layers, suggesting a role of the starchy endosperm in regulating the GA3 response of the aleurone layer. Grains of the cultivar Kristina harvested from short day- and long day-grown plants lacked dormancy, and their isolated aleurone layers had a similar responsiveness to GA3 as measured by {alpha}-amylase secretion. The data indicate that the physiological state of the aleurone layers contributes to the percentage germination of the grains.




This article has been cited by other articles:


Home page
 Plant Physiol.Home page
I. Debeaujon and M. Koornneef
Gibberellin Requirement for Arabidopsis Seed Germination Is Determined Both by Testa Characteristics and Embryonic Abscisic Acid
Plant Physiology, February 1, 2000; 122(2): 415 - 424.
[Abstract] [Full Text]

Home page
 Genes Dev.Home page
U Hoecker, I K Vasil, and D R McCarty
Integrated control of seed maturation and germination programs by activator and repressor functions of Viviparous-1 of maize.
Genes & Dev., October 15, 1995; 9(20): 2459 - 2469.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1992 by the American Society of Plant Biologists