title: Osmotic stress-induced phosphoinositide and inositol phosphate signalling in plants.
abstract: Polyphosphoinositides (PPIs) became famous for their role in inositol-1,4,5-trisphosphate (InsP3) mediated-Ca(2+) signalling in mammalian cells, generated through signal-activated phospholipase C (PLC) hydrolysis of the minor membrane lipid, phosphatidylinositol-4,5-bisphosphate. For many years, the plant field followed the same paradigm, however, slowly a completely different picture is emerging. Moreover, various novel PPI-signalling compounds have been identified meanwhile, with new functions and targets coming to light. These include lipids phosphorylated at the D3-position of inositol but also water-soluble inositolpolyphosphates (IPPs). For several of them, a relationship to water stress has been reported. This review summarizes the current status of PPIs and IPPs in plants and discusses their potential in osmotic stress signalling and drought.
authors.affiliation: Swammerdam Institute for Life Sciences, University of Amsterdam, the Netherlands. t.munnik@uva.nl <t.munnik@uva.nl>
authors.forename: Teun
authors.initials: T
authors.lastname: Munnik
authors.forename: Joop E M
authors.initials: JE
authors.lastname: Vermeer
mesh_terms: D055864:Droughts; D007295:Inositol Phosphates / Q000378:metabolism*; D009995:Osmosis; D018129:Phosphatidylinositol Phosphates / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D015398:Signal Transduction; D013312:Stress, Physiological; D014867:Water / Q000378:metabolism
chemical_list: D007295:Inositol Phosphates; D018129:Phosphatidylinositol Phosphates; D014867:Water