One of the fundamental plant growth substances, indole-3-acetic acid (IAA), belongs to a class of phytohormones known as auxins. The main IAA biosynthesis pathway involves the conversion of tryptophan to indole-3-pyruvic acid, which is in turn converted to IAA. The two enzymes responsible for these conversions, members of the TAA1 and YUCCA gene families, respectively, have recently been implicated in the synthesis of another auxin, phenylacetic acid (PAA). While there is some evidence to support this theory, there are also some concerns. Here we address the question: to what extent does the TAA1/YUCCA system contribute to the biosynthesis of PAA? In addition, we highlight the importance of measuring auxin metabolites and conjugates in addressing such questions.

Item Type:	Refereed Article
Keywords:	aminotransferase, amino acid, biosynthesis, metabolism, phytohormone
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:	Ross, JJ (Associate Professor John Ross)
ID Code:	116920
Year Published:	2016
Web of Science® Times Cited:	12
Deposited By:	Biological Sciences
Deposited On:	2017-05-25
Last Modified:	2017-11-02
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