Colletotrichum dematium infection on leaves ofPeperomia tithymaloides

  • Z. Maleki
  • B. N. Saxena


Symptomatology, histopathology and etiology ofColletotrichum dematium (Pers. ex Fr.) Grove infection on leaves ofPeperomia tithymaloides A. Dietr. have been described. Isolations from diseased tissue yielded two strains, A and B, differing in certain cultural characters but not in the morphology of their conidia and condiiophores. Strain A is more virulent than strain B. Both strains infect uninjured host leaves but not stem. Adaxial epidermis is more susceptible to infection than abaxial epidermis. Wounding aids infection.

In vitro association of natural sectors or paired colonies of strains A and B leads to the development of densely crowded, large, heavily sporulating acervuli. Mycelia of strains A and B seem to anastomose, yielding conidia which on subculture show sectoring and segregation of the two parental strains.


Abaxial Epidermis Cultural Character Adaxial Epidermis Adaxial Leaf Surface Natural Sector 
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Copyright information

© Indian Academy of Sciences 1972

Authors and Affiliations

  • Z. Maleki
    • 1
  • B. N. Saxena
    • 1
  1. 1.Botany DepartmentUniversity of LucknowLucknow-7India

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