Oxidative burst in alfalfa-Sinorhizobium meliloti symbiotic interaction

Mol Plant Microbe Interact. 2001 Jan;14(1):86-9. doi: 10.1094/MPMI.2001.14.1.86.


Reactive oxygen species are produced as an early event in plant defense response against avirulent pathogens. We show here that alfalfa responds to infection with Sinorhizobium meliloti by production of superoxide and hydrogen peroxide. This similarity in the early response to infection by pathogenic and symbiotic bacteria addresses the question of which mechanism rhizobia use to counteract the plant defense response.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Hydrogen Peroxide / metabolism
  • Medicago sativa / metabolism*
  • Medicago sativa / microbiology*
  • Medicago sativa / ultrastructure
  • Microscopy, Electron
  • Nitrogen Fixation
  • Respiratory Burst
  • Sinorhizobium meliloti / metabolism*
  • Superoxides / metabolism
  • Symbiosis


  • Superoxides
  • Hydrogen Peroxide