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Models for gibberellic acid transport and enzyme production and transport in the aleurone layer of barley


O'Brien, R and Fowkes, N and Bassom, AP, Models for gibberellic acid transport and enzyme production and transport in the aleurone layer of barley, Journal of Theoretical Biology, 267, (1) pp. 15-21. ISSN 0022-5193 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 Elsevier Ltd.

DOI: doi:10.1016/j.jtbi.2010.07.030


Gibberellins are growth hormones produced in the embryo of grain released during germination. They promote growth through the production of enzymes in the aleurone layer surrounding the endosperm. These enzymes then diffuse into the endosperm and produce the sugars required by the growing acrospire. Here we model the transport of gibberellins into and along the aleurone layer, the consequent production of enzymes, and their transport into the endosperm. Simple approximate solutions of the governing equations are obtained which suggest that the enzymes are released immediately behind a gibberellin front which travels with almost constant speed along the aleurone layer. The model also suggests that this propagation speed is determined primarily by conditions near the scutellum–aleurone junction, which may enable the embryo to actively control the germination process.

Item Details

Item Type:Refereed Article
Keywords:barley modifications, gibberellic acid, enzyme production in the aleurone, malting
Research Division:Mathematical Sciences
Research Group:Applied mathematics
Research Field:Theoretical and applied mechanics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the mathematical sciences
UTAS Author:Bassom, AP (Professor Andrew Bassom)
ID Code:105720
Year Published:2010
Web of Science® Times Cited:7
Deposited By:Mathematics and Physics
Deposited On:2016-01-13
Last Modified:2016-07-06

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