Bipolaris marantae sp. nov., A Novel Helminthosporoid Species Causing Foliage Blight of the Garden Plant Maranta leuconeura in Brazil.
10.5941/MYCO.2017.45.3.123
- Author:
Carla Cristina Gomes LOURENÇO
1
;
Janaina Lana ALVES
;
Eduardo GUATIMOSIM
;
Adans COLMAN
;
Robert Weingart BARRETO
Author Information
1. Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil. rbarreto@ufv.br
- Publication Type:Original Article
- Keywords:
Asexual morph;
Ornamental;
Pathogens;
Phylogeny;
Pleosporales;
Taxonomy
- MeSH:
Agriculture*;
Brazil*;
Classification;
Fungi;
Germination;
Marantaceae*;
Mitosporic Fungi;
Phylogeny;
Plants*;
Spores, Fungal;
Virulence
- From:Mycobiology
2017;45(3):123-128
- CountryRepublic of Korea
- Language:English
-
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.
