The plant hormone auxin is a key regulator of plant growth and development. Differences in auxin distribution within tissues are mediated by the polar auxin transport machinery, and cellular auxin responses occur depending on changes in cellular auxin levels. Multiple receptor systems at the cell surface and in the interior operate to sense and interpret fluctuations in auxin distribution that occur during plant development. Until now, three proteins or protein complexes that can bind auxin have been identified. SCF(TIR1) [a SKP1-cullin-1-F-box complex that contains transport inhibitor response 1 (TIR1) as the F-box protein] and S-phase-kinase-associated protein 2 (SKP2) localize to the nucleus, whereas auxin-binding protein 1 (ABP1), predominantly associates with the endoplasmic reticulum and cell surface. In this Cell Science at a Glance article, we summarize recent discoveries in the field of auxin transport and signaling that have led to the identification of new components of these pathways, as well as their mutual interaction.

Institute of Science and Technology and Department of Plant Biotechnology and Bioinformatics Ghent University BE 9052 Gent Belgium

Institute of Science and Technology and Department of Plant Biotechnology and Bioinformatics Ghent University BE 9052 Gent Belgium Mendel Centre for Plant Genomics and Proteomics Masaryk University CEITEC MU CZ 625 00 Brno Czech Republic

Citace poskytuje Crossref.org

The TOR-Auxin Connection Upstream of Root Hair Growth

Auxins and Cytokinins-The Role of Subcellular Organization on Homeostasis

PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism

WRKY23 is a component of the transcriptional network mediating auxin feedback on PIN polarity

Click chemistry-based tracking reveals putative cell wall-located auxin binding sites in expanding cells

Strong morphological defects in conditional Arabidopsis abp1 knock-down mutants generated in absence of functional ABP1 protein