Mycopathologia et mycologia applicata

, Volume 52, Issue 3–4, pp 325–330 | Cite as

Production of a toxic metabolite and pectolytic enzyme by Pythium butleri

  • K. K. Janardhanan
  • Akhtar Husain


Pythium butleri which causes root-rot of Belladonna produced a heat stable toxic metabolitein vitro. The culture filtrate induced wilting when applied to cut shoots. The pathogen produced significant amount of endo-polygalacturonase, endo-polymethylgalacturonase, exo-polygalacturonase, polygalacturonate transeliminase and pectin methyl-trans-eliminase in media containing glucose and pectin as carbon source. The fungus did not produce pectin methyl estrase and was very weakly cellulolytic. The extensive distintegration of host tissue during pathogenesis can be considered due to the pectolytic enzymes produced by the pathogen. The physiology of this fungus differs markedly from other species ofPythium and justifies its taxonomic position as a distinct species.


Glucose Enzyme Methyl Carbon Source Pectin 
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Copyright information

© Dr. W. Junk B.V. 1974

Authors and Affiliations

  • K. K. Janardhanan
    • 1
  • Akhtar Husain
    • 1
  1. 1.Regional Research LaboratoryJammu-TawiIndia

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