Induction of resistance to Xanthomonas oryzae pv. oryzae in rice by benzothiadiazole (BTH)

R. M. Babu, R. Velazhahan, P. Vidhyasekaran, K. Seetharaman, A. Sajeena

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Systematic acquired resistance induced by benzo (1,2,3) thiadiazole-7-carbothioic acid S-methyl ester (BTH) in rice against bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae was studied. Rice plants (IR 50) pre-treated with BTH showed resistance to a challenge infection with Xanthomonas oryzae pv. oryzae. About 50% reduction in disease intensity was observed in plants treated with BTH at 100 μg a.i./ml. Immunoblot analysis using barley chitinase antiserum revealed the induction of a 35 kDa chitinase in rice in response to treatment with BTH. The results indicate that the BLB resistance can be induced even in genetically susceptible cultivar through application of BTH.

Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalActa Phytopathologica et Entomologica Hungarica
Issue number1-2
Publication statusPublished - 2003



  • Bacterial leaf blight
  • BTH
  • Chitinase
  • Induced resistance
  • Oryza sativa
  • Pathogenesis-related proteins

ASJC Scopus subject areas

  • Insect Science
  • Plant Science

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