title: Receptors, repressors, PINs: a playground for strigolactone signaling.
abstract: Strigolactones, previously identified as active stimuli of seed germination in parasitic plants, are now recognized as a new group of plant hormones that are active in both shoots and roots. Here, we review recent insights into the concepts of strigolactones-signal transduction and their mode of action. Although strigolactones are sensed via a cell-specific reception system, at least some aspects of their activity are conducted in a non-cell-autonomous fashion. Strigolactones also affect trafficking and plasma-membrane localization of the auxin transporter PIN, thereby regulating auxin flux. We present a model for strigolactone-signal transduction that might also explain the integration of strigolactones into other hormone-signaling pathways via the regulation of PIN auxin transporters.
authors.affiliation: Institute of Plant Sciences, ARO, Volcani Center, Bet-Dagan 50250, Israel. Electronic address: hkoltai@agri.gov.il.
authors.forename: Hinanit
authors.initials: H
authors.lastname: Koltai
mesh_terms: D007210:Indoleacetic Acids / Q000378:metabolism; D007783:Lactones / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D007210:Indoleacetic Acids; D007783:Lactones; D010937:Plant Growth Regulators
keywords: D14; D53; MAX2; PIN; auxin; cytokinin; plant hormone; signal transduction; strigolactone