BABA and Phytophthora nicotianae Induce Resistance to Phytophthora capsici in Chile Pepper (Capsicum annuum)

PLoS One. 2015 May 28;10(5):e0128327. doi: 10.1371/journal.pone.0128327. eCollection 2015.

Abstract

Induced resistance in plants is a systemic response to certain microorganisms or chemicals that enhances basal defense responses during subsequent plant infection by pathogens. Inoculation of chile pepper with zoospores of non-host Phytophthora nicotianae or the chemical elicitor beta-aminobutyric acid (BABA) significantly inhibited foliar blight caused by Phytophthora capsici. Tissue extract analyses by GC/MS identified conserved change in certain metabolite concentrations following P. nicotianae or BABA treatment. Induced chile pepper plants had reduced concentrations of sucrose and TCA cycle intermediates and increased concentrations of specific hexose-phosphates, hexose-disaccharides and amino acids. Galactose, which increased significantly in induced chile pepper plants, was shown to inhibit growth of P. capsici in a plate assay.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aminobutyrates / pharmacology*
  • Capsicum / metabolism*
  • Capsicum / microbiology
  • Citric Acid Cycle / drug effects
  • Disease Resistance / drug effects*
  • Phytophthora / metabolism*
  • Plant Diseases / microbiology*

Substances

  • Aminobutyrates
  • 3-aminobutyric acid

Grants and funding

This work was partially funded through the New Mexico Chile Association. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.