Host-specific toxin production by Rhizoctonia solani, the rice sheath blight pathogen

P. Vidhyasekaran*, T. Ruby Ponmalar, R. Samiyappan, R. Velazhahan, R. Vimala, A. Ramanathan, V. Paranidharan, S. Muthukrishnan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

116 Citations (SciVal)


Rhizoctonia solani, the rice sheath blight pathogen, produces a toxin that reproduces all symptoms of the disease. The toxin has been partially purified and it was found to be a carbohydrate containing glucose, mannose, N-acetylgalactosamine, and N-acetylglucosamine. The toxin was also detected in infected leaves. Highly virulent isolates produced more toxin than less virulent isolates. Several R. solani isolates from rice and one each from cotton and tomato produced a similar toxin. All rice cultivars tested were susceptible to the pathogen and sensitive to the toxin. Host specificity of the toxin has been demonstrated using hosts and nonhosts of the pathogen.

Original languageEnglish
Pages (from-to)1258-1263
Number of pages6
Issue number12
Publication statusPublished - Dec 1997
Externally publishedYes

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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