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Plant hormone interactions: how complex are they?

Version 2 2023-06-23, 11:03
Version 1 2023-05-26, 10:26
journal contribution
posted on 2023-06-23, 11:03 authored by John RossJohn Ross, DE Weston, SE Davidson, James ReidJames Reid
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