Osmotic stress-induced phosphoinositide and inositol phosphate signalling in plants

Plant Cell Environ. 2010 Apr;33(4):655-69. doi: 10.1111/j.1365-3040.2009.02097.x.

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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Droughts
  • Inositol Phosphates / metabolism*
  • Osmosis*
  • Phosphatidylinositol Phosphates / metabolism*
  • Plants / metabolism*
  • Signal Transduction*
  • Stress, Physiological
  • Water / metabolism

Substances

  • Inositol Phosphates
  • Phosphatidylinositol Phosphates
  • Water