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http://dx.doi.org/10.5941/MYCO.2017.45.3.123

Bipolaris marantae sp. nov., A Novel Helminthosporoid Species Causing Foliage Blight of the Garden Plant Maranta leuconeura in Brazil  

Lourenco, Carla Cristina Gomes (Departamento de Fitopatologia, Universidade Federal de Vicosa)
Alves, Janaina Lana (Departamento de Fitopatologia, Universidade Federal de Vicosa)
Guatimosim, Eduardo (Instituto de Ciencias Biologicas, Universidade Federal do Rio Grande)
Colman, Adans (Departamento de Fitopatologia, Universidade Federal de Vicosa)
Barreto, Robert Weingart (Departamento de Fitopatologia, Universidade Federal de Vicosa)
Publication Information
Mycobiology / v.45, no.3, 2017 , pp. 123-128 More about this Journal
Abstract
A severe leaf spot, turning to foliage blight, was observed on leaves of Maranta leuconeura growing in a garden in Brazil (state of Rio de Janeiro) in 2015. A dematiaceous hyphomycete bearing a morphology typical of a helminthosporoid fungi was regularly found in association with diseased tissues. The fungus was isolated and pathogenicity was demonstrated through the completion of Koch's postulates. A morphology and molecular analysis led to the conclusion that the fungus belonged to the genus Bipolaris, which is characterized by having fusiform conidia, externally thickened and truncate hila and a bipolar pattern of germination. Additionally, homology of internal transcribed spacer and GAPDH sequences with sequences of other Bipolaris species, confirmed its generic placement. A phylogenetic study also indicated clearly that the fungus on M. leuconeura is phylogenetically distinct from related species of this genus, leading to the proposal of the new species Bipolaris marantae.
Keywords
Asexual morph; Ornamental; Pathogens; Phylogeny; Pleosporales; Taxonomy;
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