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Models describing plant hormone interactions are often complex and weblike. Here we assess several suggested interactions within one experimental system, elongating pea internodes. Results from this system indicate that at least some suggested interactions between auxin, gibberellins (GAs), brassinosteroids (BRs), abscisic acid (ABA) and ethylene do not occur in this system or occur in the reverse direction to that suggested. Furthermore, some of the interactions are relatively weak and may be of little physiological relevance. This is especially true if plant hormones are assumed to show a log-linear response curve as many empirical results suggest. Although there is strong evidence to support some interactions between hormones (e.g. auxin stimulating ethylene and bioactive GA levels), at least some of the web-like complexities do not appear to be justified or are overstated. Simpler and more targeted models may be developed by dissecting out key interactions with major physiological effects.

Item Type:	Refereed Article
Research Division:	Biological Sciences
Research Group:	Plant biology
Research Field:	Plant physiology
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Horticultural crops
Objective Field:	Horticultural crops not elsewhere classified
UTAS Author:	Ross, JJ (Associate Professor John Ross)
UTAS Author:	Weston, DE (Mrs Diana Nahodil)
UTAS Author:	Davidson, SE (Dr Sandra Davidson)
UTAS Author:	Reid, JB (Professor Jim Reid)
ID Code:	71963
Year Published:	2011
Web of Science® Times Cited:	58
Deposited By:	Plant Science
Deposited On:	2011-08-16
Last Modified:	2012-04-16
Downloads:	2 View Download Statistics