Mycopathologia et mycologia applicata

, Volume 39, Issue 2, pp 155–163 | Cite as

Pathogenesis of leaf smut disease of dahlia caused by Entyloma calendulae F. Sp. dahliae

  • E. K. Okaisabor


On the basis of lesion size and the severity of infection, it was possible to group the tested dahlias into immune, resistant and susceptible varieties, the varieties with small lesions probably exhibiting hypersensitive reactions to infection. Studies on the mechanism of resistance showed that the pre-infectional polyphenolic content of the resistant varieties was higher than in the susceptible plants, and this factor is probably associated with resistance.


Hypersensitive Reaction Lesion Size Small Lesion Resistant Variety Polyphenolic Content 
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Auf Grund der Größe der Läsionen und der Schwere der Infektion war es möglich, die untersuchten Dahlien in immune, widerstandsfähige und empfindliche Varietäten einzuordnen. Die Varietäten mit kleinen Läsionen zeigen wahrscheinlich eine Überempfindlichkeitsreaktion zu der Infektion. Untersuchungen an den Mechanismen der Widerstandsfähigkeit zeigten, daß der vorinfektiöse polyphenilische Gehalt der Widerstandsfähigen Varietäten höher war, denn in den empfindlichen Pflanzen. Dieser Faktor is wahrscheinlich mit der Widerstandsfähigkeit vergesellschaftet.


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Copyright information

© Dr. W. Junk N.V. 1969

Authors and Affiliations

  • E. K. Okaisabor
    • 1
  1. 1.Department of BotanyUniversity of ExeterUK

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