title: Auxin regulation of cell polarity in plants.
abstract: Auxin is well known to control pattern formation and directional growth at the organ/tissue levels via the nuclear TIR1/AFB receptor-mediated transcriptional responses. Recent studies have expanded the arena of auxin actions as a trigger or key regulator of cell polarization and morphogenesis. These actions require non-transcriptional responses such as changes in the cytoskeleton and vesicular trafficking, which are commonly regulated by ROP/Rac GTPase-dependent pathways. These findings beg for the question about the nature of auxin receptors that regulate these responses and renew the interest in ABP1 as a cell surface auxin receptor, including the work showing auxin-binding protein 1 (ABP1) interacts with the extracellular domain of the transmembrane kinase (TMK) receptor-like kinases in an auxin-dependent manner, as well as the debate on this auxin binding protein discovered about 40 years ago. This review highlights recent work on the non-transcriptional auxin signaling mechanisms underscoring cell polarity and shape formation in plants.
authors.affiliation: Haixia Institute of Science and Technology, Horticultural Plant Biology and Metabolomics Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Center for Plant Cell Biology, Institute of Integrated Genome Biology, Department of Botany and Plant Sciences, University of California, Riverside, CA, USA.
authors.forename: Xue
authors.initials: X
authors.lastname: Pan
authors.affiliation: Haixia Institute of Science and Technology, Horticultural Plant Biology and Metabolomics Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: sishenbb@163.com.
authors.forename: Jisheng
authors.initials: J
authors.lastname: Chen
authors.affiliation: Center for Plant Cell Biology, Institute of Integrated Genome Biology, Department of Botany and Plant Sciences, University of California, Riverside, CA, USA. Electronic address: zhenbiao.yang@ucr.edu.
authors.forename: Zhenbiao
authors.initials: Z
authors.lastname: Yang
mesh_terms: D016764:Cell Polarity; D007210:Indoleacetic Acids / Q000378:metabolism*; D063245:Plant Development; D010937:Plant Growth Regulators / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D007210:Indoleacetic Acids; D010937:Plant Growth Regulators