Cercospora coffeicola is the causal agent of brown eye spot, an important disease of coffee (Coffea arabica) in Brazil. However, atypical symptom as darker and larger lesions, named black spot, has been reported in field. In this study, we tested the hypothesis that the causal agent of black spot belongs to the same species pathogenic to brown eye spot. Nineteen strains obtained from diseased coffee found in the five largest coffee-producing states of Brazil were characterized by a combination of molecular phylogenic methods, using a multi-locus approach (internal transcribed spacer regions and intervening 5.8S nrRNAs, actin, calmodulin, histone H3, and translation elongation factor 1-alpha), analyses of morphological markers and pathogenicity. Strains from brown eye spot and black spot disease on coffee leaves formed a clade with C. coffeicola strain from Japan. All strains showed same morphological characteristics and caused brown eye spot symptoms in greenhouse. These results confirm that the species associated with brown eye spot and black spot disease on coffee leaves is C. coffeicola. Additionally, an epitype is proposed for C. coffeicola.
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This research was supported by the National Council for Scientific and Technological Development (CNPq), the Coordination for the Improvement of Higher Education Personnel (CAPES), Foundation for Research Support of the State of Minas Gerais (FAPEMIG), and the National Institute of Science and Technology of Coffee (INCT-Café).
The authors declare that have followed the guidelines of the Ethical Standards requested by EJPP, and this manuscript is original and not published elsewhere.
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The authors declare no conflict of interest.
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No human participants and/or animals are involved in this research.
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Maximum parsimony tree inferred from ITS sequences showing relationships among Cercospora species. Bootstrap values are presented above the nodes. Tree scores, confidence interval [CI] = 0.846 and retention index [RI] = 0.789. (PDF 92 kb)
Maximum parsimony tree inferred from actA sequences showing relationships among Cercospora species. Bootstrap values are presented above the nodes. Tree scores, confidence interval [CI] = 0.948 and retention index [RI] = 0.925. (PDF 91 kb)
Maximum parsimony tree inferred from his3sequences showing relationships among Cercospora species. Bootstrap values are presented above the nodes. Tree scores, confidence interval [CI] = 1.0 and retention index [RI] = 1.0. (PDF 91 kb)
Maximum parsimony tree inferred from cmdA sequences showing relationships among Cercospora species. Bootstrap values are presented above the nodes. Tree scores, confidence interval [CI] = 0.924 and retention index [RI] = 0.827. (PDF 88 kb)
Maximum parsimony tree inferred from tef1 sequences showing relationships among Cercospora species. Bootstrap values are presented above the nodes. Tree scores, confidence interval [CI] = 0.921 and retention index [RI] = 0.76. (PDF 85 kb)
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Vale, P.A.S., de Resende, M.L.V., dos Santos Botelho, D.M. et al. Epitypification of Cercospora coffeicola and its involvement with two different symptoms on coffee leaves in Brazil. Eur J Plant Pathol 159, 399–408 (2021). https://doi.org/10.1007/s10658-020-02170-y
- Black spot
- Brown eye spot
- Coffea arabica
- Multilocus phylogeny
- Plant disease