Document Detail

Biosynthesis of the halogenated auxin, 4-chloroindole-3-acetic acid.
MedLine Citation:
PMID:  22573801     Owner:  NLM     Status:  MEDLINE    
Seeds of several agriculturally important legumes are rich sources of the only halogenated plant hormone, 4-chloroindole-3-acetic acid. However, the biosynthesis of this auxin is poorly understood. Here, we show that in pea (Pisum sativum) seeds, 4-chloroindole-3-acetic acid is synthesized via the novel intermediate 4-chloroindole-3-pyruvic acid, which is produced from 4-chlorotryptophan by two aminotransferases, TRYPTOPHAN AMINOTRANSFERASE RELATED1 and TRYPTOPHAN AMINOTRANSFERASE RELATED2. We characterize a tar2 mutant, obtained by Targeting Induced Local Lesions in Genomes, the seeds of which contain dramatically reduced 4-chloroindole-3-acetic acid levels as they mature. We also show that the widespread auxin, indole-3-acetic acid, is synthesized by a parallel pathway in pea.
Nathan D Tivendale; Sandra E Davidson; Noel W Davies; Jason A Smith; Marion Dalmais; Abdelhafid I Bendahmane; Laura J Quittenden; Lily Sutton; Raj K Bala; Christine Le Signor; Richard Thompson; James Horne; James B Reid; John J Ross
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-05-09
Journal Detail:
Title:  Plant physiology     Volume:  159     ISSN:  1532-2548     ISO Abbreviation:  Plant Physiol.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-07-03     Completed Date:  2012-10-29     Revised Date:  2013-06-25    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1055-63     Citation Subset:  IM    
School of Plant Science , University of Tasmania, Sandy Bay, Tasmania, Australia 7005.
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MeSH Terms
Biosynthetic Pathways
Chromatography, High Pressure Liquid
Gene Expression Regulation, Plant
Indoleacetic Acids / chemistry,  metabolism*
Indoles / metabolism
Isotope Labeling
Mass Spectrometry
Mutation / genetics
Peas / genetics,  growth & development,  metabolism*
Plant Proteins / genetics,  metabolism
Reference Standards
Seeds / genetics,  growth & development
Reg. No./Substance:
0/Indoleacetic Acids; 0/Indoles; 0/Plant Proteins; 2519-61-1/4-chloroindole-3-acetic acid; 392-12-1/indol-3-yl pyruvic acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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