A host-specific toxin of Rhizoctonia solani triggers superoxide dismutase (SOD) activity in rice

V. Paranidharan, A. Palaniswami, P. Vidhyasekaran, R. Velazhahan

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7 Citations (Scopus)


Changes in the activity of superoxide dismutase (SOD) in rice in response to treatment with Rhizoctonia solani toxin and/or R. solani elicitor were studied. Treatment of rice leaf sheaths with R. solani-toxin significantly increased the SOD activity within 12 h and the maximum enzyme activity was detected 36 h after treatment at which period a fourfold increase in SOD activity was recorded compared to control plants. Isozyme analysis indicated that five new SOD isozymes (SOD-1, SOD-3, SOD-6, SOD-7 and SOD-8) were induced in rice 1-2 days after toxin treatment. In elicitor-treated rice leaf sheaths, SOD-2 increased in activity 1-5 days after treatment. Pretreatment of rice leaf sheaths with elicitor suppressed the toxin-induced accumulation of SOD.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalArchives of Phytopathology and Plant Protection
Issue number2
Publication statusPublished - May 2005



  • Elicitor
  • Oryza sativa
  • Rhizoctonia solani
  • Sheath blight
  • Superoxide dismutase
  • Toxin

ASJC Scopus subject areas

  • Agronomy and Crop Science

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