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Colletotrichum dematium infection on leaves ofPeperomia tithymaloides

  • Z. Maleki
  • B. N. Saxena
Article
  • 17 Downloads

Abstract

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.

Keywords

Abaxial Epidermis Cultural Character Adaxial Epidermis Adaxial Leaf Surface Natural Sector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Das-Gupta, S. N... “Formation of pycnidia inCytosporina ludibunda by the intermingling of two infertile strains,”Ann. Bot., 1933,47, 689–90.Google Scholar
  2. Dey, P. K... “Studies in the physiology of parasitism—V. Infection byColletotrichum lindemuthianum,” Ibid., 1919,33, 305–12.Google Scholar
  3. Saxena, B. N. and Maleki, Z... “Leaf-infecting fungi of ornamental and allied plants of Uttar Pradesh: new records and host index,”J. Sci., Res., Lucknow Univ., 1959,1, 11–22.Google Scholar
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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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