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Interactions between gibberellins and other hormones


Ross, JJ and Miraghazadeh, A and Beckett, EH and Quittenden, LJ and McAdam, EL, Interactions between gibberellins and other hormones, Annual Plant Reviews - Volume 49: The Gibberellins, John Wiley & Sons, P Hedden and SG Thomas (ed), United Kingdom, pp. 229-252. ISBN 9781119210429 (2016) [Research Book Chapter]

Copyright Statement

Copyright 2016 John Wiley & Sons Ltd.

DOI: doi:10.1002/9781119210436.ch8


In this chapter we discuss interactions between the gibberellins (GAs) and other plant hormones. Auxin and ethylene exert strong effects on GA levels, and at least some of the physiological responses to auxin are mediated by increased GA content. Abscisic acid (ABA) and GA appear to negatively regulate each other's levels in seeds, consistent with their antagonistic effects on germination. It has been suggested that several non-GA hormones affect the stability of DELLAs, the key signalling proteins that are destabilised by GAs. However, it appears that the reported effects of these additional hormones on DELLA stability are either mediated by changes in GA content, or have not yet been confirmed. Recent papers provide evidence that DELLAs physically interact with transcriptional regulators from the signalling pathways of the brassinosteroids, ethylene, jasmonic acid and ABA. This may represent a physiologically significant way in which GAs interact with other signalling pathways, and helps to explain how DELLAs, which lack a conserved DNA binding domain, can regulate gene transcription.

Item Details

Item Type:Research Book Chapter
Keywords:gibberellin, auxin, ehtylene, abscisic acid, brassinosteriod, jasmonic acid, strigolactone, cytokinin, hormones, interaction
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Ross, JJ (Associate Professor John Ross)
UTAS Author:Beckett, EH (Ms Amelia Beckett)
UTAS Author:Quittenden, LJ (Dr Laura Quittenden)
UTAS Author:McAdam, EL (Dr Erin McAdam)
ID Code:115286
Year Published:2016
Funding Support:Australian Research Council (DP130103357)
Deposited By:Plant Science
Deposited On:2017-03-14
Last Modified:2017-10-16

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