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Auxin biosynthesis: are the indole-3-acetic acid and phenylacetic acid biosynthesis pathways mirror images?
Citation
Cook, SD and Nichols, DS and Smith, J and Chourey, PS and McAdam, EL and Quittenden, L and Ross, JJ, Auxin biosynthesis: are the indole-3-acetic acid and phenylacetic acid biosynthesis pathways mirror images?, Plant Physiology, 171, (2) pp. 1230-1241. ISSN 0032-0889 (2016) [Refereed Article]
Copyright Statement
Copyright 2016 American Society of Plant Biologists
Abstract
The biosynthesis of the main auxin in plants (indole-3-acetic acid [IAA]) has been elucidated recently and is thought to involve
the sequential conversion of Trp to indole-3-pyruvic acid to IAA. However, the pathway leading to a less well studied auxin,
phenylacetic acid (PAA), remains unclear. Here, we present evidence from metabolism experiments that PAA is synthesized
from the amino acid Phe, via phenylpyruvate. In pea (Pisum sativum), the reverse reaction, phenylpyruvate to Phe, is also
demonstrated. However, despite similarities between the pathways leading to IAA and PAA, evidence from mutants in pea
and maize (Zea mays) indicate that IAA biosynthetic enzymes are not the main enzymes for PAA biosynthesis. Instead, we
identified a putative aromatic aminotransferase (PsArAT) from pea that may function in the PAA synthesis pathway.
Item Details
Item Type: | Refereed Article |
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Keywords: | auxin, biosynthesis, amino acids |
Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant physiology |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Grains and seeds |
Objective Field: | Rice |
UTAS Author: | Cook, SD (Mr Sam Cook) |
UTAS Author: | Nichols, DS (Dr David Nichols) |
UTAS Author: | Smith, J (Associate Professor Jason Smith) |
UTAS Author: | McAdam, EL (Dr Erin McAdam) |
UTAS Author: | Quittenden, L (Dr Laura Quittenden) |
UTAS Author: | Ross, JJ (Associate Professor John Ross) |
ID Code: | 109435 |
Year Published: | 2016 |
Funding Support: | Australian Research Council (DP130103357) |
Web of Science® Times Cited: | 23 |
Deposited By: | Plant Science |
Deposited On: | 2016-06-16 |
Last Modified: | 2017-11-02 |
Downloads: | 0 |
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