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Updated: Mar 20, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Localization and interactions between Arabidopsis auxin biosynthetic enzymes in the TAA/YUC-dependent pathway
Verena Kriechbaumer1, Stanley W Botchway2, Chris Hawes3
1Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, UK vkriechbaumer@brookes.ac.uk.
Abstract:
The growth regulator auxin is involved in all key developmental processes in plants. A complex network of a multiplicity of potential biosynthetic pathways as well as transport, signalling plus conjugation and deconjugation lead to a complex and multifaceted system system for auxin function. This raises the question how such a system can be effectively organized and controlled. Here we report that a subset of auxin biosynthetic enzymes in the TAA/YUC route of auxin biosynthesis is localized to the endoplasmic reticulum (ER). ER microsomal fractions also contain a significant percentage of auxin biosynthetic activity. This could point toward a model of auxin function using ER membrane location and subcellular compartmentation for supplementary layers of regulation. Additionally we show specific protein-protein interactions between some of the enzymes in the TAA/YUC route of auxin biosynthesis.
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