Pathogenicity evaluation of Cytospora eucalypticola isolated from Eucalyptus spp: cankers in Uruguay

Author:

Alonso Raquel1,Lupo Sandra1,Bettucci Lina1

Affiliation:

1. Facultad de Ciencias-Facultad de Ingeniería

Abstract

Cytospora eucalypticola has been frequently associated with twig and stem cankers and as endophyte of Eucalyptus globulus and E. grandis in Uruguay. Mycelium discs of two C. eucalypticola isolates obtained from actively growing colonies were inoculated, both superficially and on experimentally wounded stems of E. globulus and E. grandis. No inoculated and control plants have shown any discoloration, gumosis or necrosis nor did they display lesions ten months after inoculation. Callus tissue was formed, partially or wholly occluding the wounds. The ability to penetrate healthy tissues and the inability to produce lesions evidenced that the presence of C. eucalypticola in twig and stem cankers could result from saprotrophic expansion of the endophytic mycelium in dying tissues, cankers probably being produced by different environmental stress conditions.

Publisher

FapUNIFESP (SciELO)

Subject

Plant Science

Reference10 articles.

1. A comparative study of fungal populations in healthy and symptomatic twigs of Eucalyptus grandis in Uruguay;BETTUCCI L.;Mycological Research,1997

2. Endophytic fungi of Eucalyptus globulus: a preliminary study;BETTUCCI L.;Mycological Research,1993

3. A comparative study of fungal populations in healthy and symptomatic twigs and seedlings of Eucalyptus globulus in Uruguay;BETTUCCI L.;Sydowia,1997

4. Endophytic mycobiota of healthy twigs and the assemblage of species associated with twig lesions of E;BETTUCCI L.;globulus and E. grandis in the central west region of Uruguay. Mycological Research,1998

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