Identity and functions of inorganic and inositol polyphosphates in plants

New Phytol. 2020 Jan;225(2):637-652. doi: 10.1111/nph.16129. Epub 2019 Sep 20.


Inorganic polyphosphates (polyPs) and inositol pyrophosphates (PP-InsPs) form important stores of inorganic phosphate and can act as energy metabolites and signaling molecules. Here we review our current understanding of polyP and inositol phosphate (InsP) metabolism and physiology in plants. We outline methods for polyP and InsP detection, discuss the known plant enzymes involved in their synthesis and breakdown, and summarize the potential physiological and signaling functions for these enigmatic molecules in plants.

Keywords: inorganic polyphosphate; inositol pyrophosphates; nutrient signaling; phosphate metabolism; phosphate starvation responses.

Publication types

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

MeSH terms

  • Allosteric Regulation
  • Inositol Phosphates / chemistry
  • Inositol Phosphates / metabolism*
  • Plant Proteins / metabolism
  • Plants / enzymology
  • Plants / metabolism*
  • Signal Transduction
  • Symbiosis


  • Inositol Phosphates
  • Plant Proteins