Work

SCF TIR1/AFB -Based Auxin Perception: Mechanism and Role in Plant Growth and Development

Year: 2015

Type: article

Abstract: Auxin regulates a vast array of growth and developmental processes throughout the life cycle of plants. Auxin responses are highly context dependent and can involve changes in cell division, cell expansion, and cell fate. The complexity of the auxin response is illustrated by the recent finding that the auxin-responsive gene set differs significantly between different cell types in the root. Auxin regulation of transcription involves a core pathway consisting of the TIR1/AFB F-box proteins, the Aux/IAA transcriptional repressors, and the ARF transcription factors. Auxin is perceived by a transient coreceptor complex consisting of a TIR1/AFB protein and an Aux/IAA protein. Auxin binding to the coreceptor results in degradation of the Aux/IAAs and derepression of ARF-based transcription. Although the basic outlines of this pathway are now well established, it remains unclear how specificity of the pathway is conferred. However, recent results, focusing on the ways that these three families of proteins interact, are starting to provide important clues.

Source: The Plant Cell

DOI: 10.1105/tpc.114.133744

Authors: Mohammad Salehin, Rammyani Bagchi, Mark Estelle

Institutions: Howard Hughes Medical Institute, University of California San Diego

Language: English

Topic: Plant Molecular Biology Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: green

Funders: Howard Hughes Medical Institute, Gordon and Betty Moore Foundation, National Institute of General Medical Sciences

Award: Mechanism of Auxin Action