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Plants contain three major growth-promoting plant hormones: auxin, gibberellins (GAs), and brassinosteroids (BRs), although other hormones also promote growth in certain circumstances. Possible interactions between the major three growth hormones have received much attention over the decades. In 2012, three articles proposed that the BRs and GAs can interact at the signaling level (Bai et al., 2012; Gallego-Bartolome et al., 2012; Li et al., 2012), and since then, this has become an accepted model (Figure 1; Oh et al., 2014; Wang et al., 2014; Davie're and Achard, 2016). This "signaling" model posits that DELLA proteins, which are negative regulators of GA signaling that are degraded by bioactive GA, physically interact with positive regulators of the BR response, BZR1 proteins (Bai et al., 2012; Gallego- Bartolome et al., 2012; Li et al., 2012). The DELLA-BZR1 interaction interferes with the function of BZR1 proteins, thereby reducing growth.

Item Type:	Letter or Note in Journal
Keywords:	gibberellin, brassinosteroid, interaction
Research Division:	Biological Sciences
Research Group:	Plant Biology
Research Field:	Plant Physiology
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Summer Grains and Oilseeds
Objective Field:	Maize
Author:	Ross, JJ (Associate Professor John Ross)
Author:	Quittenden, LJ (Dr Laura Quittenden)
ID Code:	109433
Year Published:	2016
Funding Support:	Australian Research Council (DP130103357)
Deposited By:	Plant Science
Deposited On:	2016-06-16
Last Modified:	2016-06-16
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