Rice BiP3 regulates immunity mediated by the PRRs XA3 and XA21 but not immunity mediated by the NB-LRR protein, Pi5

Biochem Biophys Res Commun. 2014 May 23;448(1):70-5. doi: 10.1016/j.bbrc.2014.04.093. Epub 2014 Apr 26.

Abstract

Plant innate immunity is mediated by pattern recognition receptors (PRRs) and intracellular NB-LRR (nucleotide-binding domain and leucine-rich repeat) proteins. Overexpression of the endoplasmic reticulum (ER) chaperone, luminal-binding protein 3 (BiP3) compromises resistance to Xanthomonas oryzae pv. oryzae (Xoo) mediated by the rice PRR XA21 [12]. Here we show that BiP3 overexpression also compromises resistance mediated by rice XA3, a PRR that provides broad-spectrum resistance to Xoo. In contrast, BiP3 overexpression has no effect on resistance mediated by rice Pi5, an NB-LRR protein that confers resistance to the fungal pathogen Magnaporthe oryzae (M. oryzae). Our results suggest that rice BiP3 regulates membrane-resident PRR-mediated immunity.

Keywords: BiP; Magnaporthe oryzae; NB-LRR; Oryzae sative; PRR; Xanthomonas oryzae pv. oryzae (Xoo).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Endoplasmic Reticulum / physiology
  • Molecular Chaperones / genetics
  • Molecular Chaperones / physiology*
  • Oryza / genetics
  • Oryza / immunology
  • Plant Diseases / genetics
  • Plant Diseases / immunology*
  • Plant Proteins / genetics
  • Plant Proteins / immunology
  • Plant Proteins / physiology*
  • Receptor Protein-Tyrosine Kinases / genetics
  • Receptor Protein-Tyrosine Kinases / physiology*
  • Receptors, Pattern Recognition / genetics
  • Receptors, Pattern Recognition / physiology*
  • Xanthomonas / pathogenicity

Substances

  • Molecular Chaperones
  • Plant Proteins
  • Receptors, Pattern Recognition
  • Receptor Protein-Tyrosine Kinases
  • Xa26 protein, Oryza sativa