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.
History
Publication title
Physiologia Plantarum
Volume
141
Issue
4
Pagination
299-309
ISSN
0031-9317
Department/School
Biological Sciences
Publisher
Wiley-Blackwell Ltd
Publication status
Published
Rights statement
The definitive published version is available online at: http://onlinelibrary.wiley.com
Repository Status
Restricted
Socio-economic Objectives
260599 Horticultural crops not elsewhere classified