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Advisor(s)
Abstract(s)
Sweet chestnut (Castanea sativa Miller) is a nutritious food with high social and economic
impacts in Portugal. The fungus Gnomoniopsis smithogilvyi (syn. Gnomoniopsis castaneae) is the causal
agent of chestnut brown rot, and is currently considered one of the major threats to the chestnut
production chain worldwide. Considering the lack of knowledge on both the disease and the
causal agent in Portugal, studies were conducted in an attempt to develop the necessary control
strategies towards the mitigation of the disease in a timely way. Isolates of G. smithogilvyi were
selected from three varieties of chestnut from the northeast of Portugal, and were characterized
at the morphological, ecophysiological and molecular levels. Tests of pathogenicity and virulence
were also developed. Gnomoniopsis smithogilvyi was confirmed as the causal agent of brown rot
disease in Portuguese chestnut varieties, which showed high susceptibility. The fungus showed high
adaptability to chestnut substrates. The Portuguese isolates of G. smithogilvyi are morphologically
and genetically similar to those from other countries, even though some physiological variability was
observed among them.
Description
Keywords
Castanea sativa Gnomoniopsis castanea Koch postulates Phytopathogen
Pedagogical Context
Citation
Possamai, Guilherme; Dallemole-Giaretta, Rosangela; Gomes-Laranjo, José; Sampaio, Ana; Rodrigues, Paula (2023). Chestnut brown rot and Gnomoniopsis smithogilvyi: characterization of the causal agent in Portugal. Journal of Fungi. eISSN 2309-608X. 9:4, p. 1-13
Publisher
MDPI