Plant hormone interactions: how complex are they?
Article first published online: 6 FEB 2011
Copyright © Physiologia Plantarum 2011
Volume 141, Issue 4, pages 299–309, April 2011
How to Cite
Ross, J. J., Weston, D. E., Davidson, S. E. and Reid, J. B. (2011), Plant hormone interactions: how complex are they?. Physiologia Plantarum, 141: 299–309. doi: 10.1111/j.1399-3054.2011.01444.x
- Issue published online: 8 MAR 2011
- Article first published online: 6 FEB 2011
- Accepted manuscript online: 10 JAN 2011 06:45AM EST
- Received 2 November 2010;, revised 15 December 2010
Models describing plant hormone interactions are often complex and web-like. 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.