Investigating variability and behaviour of Colletotrichum gloeosporioides strains from lesions of coffee blister spot

Coffee blister spot has been associated with species from the Colletotrichum genus, but there is no information on the variability of isolates present on leaf lesions. This study evaluated a population of Colletotrichum gloeosporioides strains from blister spot lesions in Coffea arabica. Colletotric...

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Bibliographic Details
Published in:Journal of phytopathology 2019-12, Vol.167 (11-12), p.645-654
Main Authors: Pereira, Lucas Fidelis, Souza, Elaine Aparecida, Pereira, Fernanda Aparecida Castro, Gonçalves, Flávia Maria Avelar
Format: Article
Language:English
Subjects:
Anastomosis
Blister spot
Blistering
Coffea arabica
Coffee
Colletotrichum
Colletotrichum gloeosporioides
Cultivars
cytological
Inoculation
Inter‐Retrotransposon Amplified Polymorphism markers
Leaves
Lesions
morphological
Mycelia
Pathogenicity
Pathogens
physiological traits
Plants
Polymorphism
Population studies
Recombination
Sporulation
Tubes
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Summary:Coffee blister spot has been associated with species from the Colletotrichum genus, but there is no information on the variability of isolates present on leaf lesions. This study evaluated a population of Colletotrichum gloeosporioides strains from blister spot lesions in Coffea arabica. Colletotrichum spp. isolates were collected from blister spot lesions on leaves of coffee trees from Catuaí and Topázio cultivars (Coffea arabica). Monosporic cultures were obtained from colonies with sporulation. A pathogenicity test was carried out by inoculation of pathogens on the leaves of young coffee plants. C. gloeosporioides strains were characterized by morphologial, cytological and physiological analyses. The molecular analysis was carried out using Inter‐Retrotransposon Amplified Polymorphism (IRAP) markers. C. gloeosporioides strains showed no pathogenicity on coffee plants and presented a wide variability in all traits evaluated. The presence of sexual strains, formation of CATs (conidial anastomosis tubes) among conidial strains and high mycelial compatibility among strains observed suggest the occurrence of sexual and asexual recombination. The role of these C. gloeosporioides strains on the lesions of coffee plant leaves is unclear.
ISSN:0931-1785
1439-0434
DOI:10.1111/jph.12857