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A mutation affecting the synthesis of 4-chloroindole-3-acetic acid


Ross, JJ and Tivendale, ND and Davidson, SE and Reid, JB and Davies, NW and Quittenden, LJ and Smith, JA, A mutation affecting the synthesis of 4-chloroindole-3-acetic acid, Plant Signalling & Behavior, 7, (12) pp. 1533-1536. ISSN 1559-2316 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 Landes Bioscience

DOI: doi:10.4161/psb.22319


Traditionally, schemes depicting auxin biosynthesis in plants have been notoriously complex. They have involved up to four possible pathways by which the amino acid tryptophan might be converted to the main active auxin, indole-3-acetic acid (IAA), while another pathway was suggested to bypass tryptophan altogether. It was also postulated that different plants use different pathways, further adding to the complexity. In 2011, however, it was suggested that one of the four tryptophan-dependent pathways, via indole-3-pyruvic acid (IPyA), is the main pathway in Arabidopsis thaliana,1 although concurrent operation of one or more other pathways has not been excluded. We recently showed that, for seeds of Pisum sativum (pea), it is possible to go one step further.2 Our new evidence indicates that the IPyA pathway is the only tryptophan-dependent IAA synthesis pathway operating in pea seeds. We also demonstrated that the main auxin in developing pea seeds, 4-chloroindole-3-acetic acid (4-Cl−IAA), which accumulates to levels far exceeding those of IAA, is synthesized via a chlorinated version of the IPyA pathway.

Item Details

Item Type:Refereed Article
Keywords:indole-3-acetic acid, pea, seed, Pisum, auxin, biosynthesis
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 environmental sciences
UTAS Author:Ross, JJ (Associate Professor John Ross)
UTAS Author:Tivendale, ND (Mr Nathan Tivendale)
UTAS Author:Davidson, SE (Dr Sandra Davidson)
UTAS Author:Reid, JB (Professor Jim Reid)
UTAS Author:Davies, NW (Associate Professor Noel Davies)
UTAS Author:Quittenden, LJ (Dr Laura Quittenden)
UTAS Author:Smith, JA (Associate Professor Jason Smith)
ID Code:80313
Year Published:2012
Funding Support:Australian Research Council (DP110102085)
Deposited By:Plant Science
Deposited On:2012-10-29
Last Modified:2017-10-25

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