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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Research » Research » Publications at this Location » Publication #354244

Research Project: Integrated Disease Management of Exotic and Emerging Plant Diseases of Horticultural Crops

Location: Horticultural Crops Research

Title: Phytophthora betacei, a new species within Phytophthora clade 1c causing late blight on Solanum betaceum in Colombia

Author
item Mideros, M - Universidad De Los Andes
item Turissini, D - University Of North Carolina
item Guayazán, N - Universidad De Los Andes
item Ibarra-avila, H - Universidad De Los Andes
item Danies, G - Universidad De Los Andes
item Cárdenas, M - Universidad De Los Andes
item Myers, K - Cornell University - New York
item Tabima, J - Oregon State University
item Goss, E - University Of Florida
item Bernal, A - Universidad De Los Andes
item Lagos, L - University Of Narino
item Grajales, A - Universidad De Los Andes
item Gonzalez, L - Universidad De Los Andes
item Cooke, D - The James Hutton Institute
item Fry, W - Cornell University - New York
item Grunwald, Niklaus - Nik
item Matute, D - University Of North Carolina
item Restrepo, S - Universidad De Los Andes

Submitted to: Persoonia: Molecular Phylogeny and Evolution of Fungi
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/12/2017
Publication Date: 2/1/2018
Citation: Mideros, M.F., Turissini, D.A., Guayazán, N., Ibarra-Avila, H., Danies, G., Cárdenas, M., Myers, K., Tabima, J., Goss, E.M., Bernal, A., Lagos, L.E., Grajales, A., Gonzalez, L.N., Cooke, D.E., Fry, W.E., Grunwald, N.J., Matute, D.R., Restrepo, S. 2018. Phytophthora betacei, a new species within Phytophthora clade 1c causing late blight on Solanum betaceum in Colombia. Persoonia: Molecular Phylogeny and Evolution of Fungi. 41:39–55. https://doi.org/10.3767/persoonia.2018.41.03.
DOI: https://doi.org/10.3767/persoonia.2018.41.03

Interpretive Summary: Over the past few years, symptoms akin to late blight disease of potato have been reported on a variety of crop plants in South America. Despite the economic importance of these crops, the pathogens causing these diseases belonging to the genus Phytophthora have not been characterized. In this study, a new Phytophthora plant pathogen species was described in Colombia from tree tomato (Solanum betaceum), a semi-domesticated fruit grown in northern South America. A range of mycological, phylogenetic and genetic methods were used to describe this new species.

Technical Abstract: Over the past few years, symptoms akin to late blight disease have been reported on a variety of crop plants in South America. Despite the economic importance of these crops, the causal agents of the diseases belonging to the genus Phytophthora have not been completely characterized. In this study, a new Phytophthora species was described in Colombia from tree tomato (Solanum betaceum), a semi-domesticated fruit grown in northern South America. Comprehensive phylogenetic, morphological, population genetic analyses, and infection assays to characterize this new species, were conducted. All data support the description of the new species, Phytophthora betacei sp. nov. Phylogenetic analyses suggest that this new species belongs to clade 1c of the genus Phytophthora and is a close relative of the potato late blight pathogen, P. infestans. Furthermore, it appeared as the sister group of the P. andina strains collected from wild Solanaceae (clonal lineage EC-2). Analyses of morphological and physiological characters as well as host specificity showed high support for the differentiation of these species. Based on these results, a complete description of the new species is provided and the species boundaries within Phytophthora clade 1c in northern South America are discussed.