Phytohormones, miRNAs, and peptide signals integrate plant phosphorus status with arbuscular mycorrhizal symbiosis

Curr Opin Plant Biol. 2019 Aug;50:132-139. doi: 10.1016/j.pbi.2019.05.004. Epub 2019 Jun 16.

Abstract

Most land plant species engage in a beneficial interaction with arbuscular mycorrhizal fungi in order to increase mineral nutrient acquisition, in particular the major macronutrient phosphorus (P). Initiation, development, and maintenance of the symbiosis are largely under the control of the host plant and strongly influenced by the plants' P status. Recent advances reveal that phytohormones, microRNAs, and secreted peptides all regulate and integrate development of arbuscular mycorrhizal (AM) symbiosis with the P status of the plant. This occurs through a complex, multi-layered signaling network with crosstalk between phosphate (Pi) starvation signaling pathways and AM symbiosis signaling, and also via direct effects on the AM fungal symbiont. Multiple checkpoints allow the plant to fine-tune symbiosis based on its P status.

Publication types

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

MeSH terms

  • MicroRNAs*
  • Mycorrhizae*
  • Peptides
  • Phosphorus
  • Plant Growth Regulators
  • Plant Roots
  • Symbiosis

Substances

  • MicroRNAs
  • Peptides
  • Plant Growth Regulators
  • Phosphorus