eCite Digital Repository

Evidence that chlorinated auxin is restricted to the Fabaceae but not to the Fabeae


Lam, HK and McAdam, SAM and McAdam, EL and Ross, JJ, Evidence that chlorinated auxin is restricted to the Fabaceae but not to the Fabeae, Plant Physiology, 168, (3) pp. 798-803. ISSN 0032-0889 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 American Society of Plant Biologists

DOI: doi:10.1104/pp.15.00410


Auxin is a pivotal plant hormone, usually occurring in the form of indole-3-acetic acid (IAA). However, in maturing pea (Pisum sativum) seeds, the level of the chlorinated auxin, 4-chloroindole-3-acetic acid (4-Cl-IAA), greatly exceeds that of IAA. A key issue is how plants produce halogenated compounds such as 4-Cl-IAA. To better understand this topic, we investigated the distribution of the chlorinated auxin. We show for the first time, to our knowledge, that 4-Cl-IAA is found in the seeds of Medicago truncatula, Melilotus indicus, and three species of Trifolium. Furthermore, we found no evidence that Pinus spp. synthesize 4-Cl-IAA in seeds, contrary to a previous report. The evidence indicates a single evolutionary origin of 4-Cl-IAA synthesis in the Fabaceae, which may provide an ideal model system to further investigate the action and activity of halogenating enzymes in plants.

Item Details

Item Type:Refereed Article
Keywords:auxin, evolution, seed development, legumes
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Lam, HK (Mr Alvin Lam)
UTAS Author:McAdam, SAM (Dr Scott McAdam)
UTAS Author:McAdam, EL (Dr Erin McAdam)
UTAS Author:Ross, JJ (Associate Professor John Ross)
ID Code:100413
Year Published:2015
Funding Support:Australian Research Council (DE140100946)
Web of Science® Times Cited:19
Deposited By:Plant Science
Deposited On:2015-05-14
Last Modified:2017-11-06

Repository Staff Only: item control page