4.2 Article

Valentiella maceioensis gen. et sp. nov. (Herpotrichiellaceae, Chaetothyriales), a new black yeast-like fungus isolated from bromeliads in Brazil

Journal

MYCOLOGICAL PROGRESS
Volume 21, Issue 2, Pages -

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s11557-022-01783-3

Keywords

Bromeliaceae; Fungal taxonomy; Neotropical Forest; Phylloplane

Categories

Funding

  1. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [475378/2013-0, 408718/2013-7, 311553/2018-4, 312889/2021-6]
  2. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

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Bromeliads have been found to be a suitable habitat for fungi, specifically yeasts and yeast-like fungi. A new genus and species, Valentiella maceioensis, were discovered from healthy leaves of Canistrum improcerum and Aechmea muricata in the Atlantic Forest of Brazil's northeastern region.
Bromeliads have shown to be an excellent reservoir for fungi, especially yeasts and yeast-like fungi. Three strains were obtained from healthy leaves of Canistrum improcerum and Aechmea muricata (Bromeliaceae) in the Atlantic Forest of the Brazilian northeastern region. They were characterized morphologically, biochemically/physiologically, and based on the sequence-based phylogenetic species concept with analysis of the nrLSU and the ITS regions and the translation elongation factor EF-1 alpha (TEF1) gene. Based on our findings, a new genus, and species, namely, Valentiella maceioensis (Herpotrichiellaceae, Chaetothyriales, Ascomycota), was introduced for these isolates. The new taxa are mainly characterized by their black yeastlike morphology, with a mycelium consisting of torulose hyphae, conidiophores that were straight or slightly flexuous, septate, and chains of brown to dark brown fusoid-ellipsoid cells; conidiogenous cells fusoid-ellipsoid, 0-1-septate, brown to dark brown, having apical scars at the apex, and producing heads of conidia; conidia ellipsoid, subglobose to globose, light brown to brown with age, occasionally having basal scars. In the yeast-like phase, pseudohyphae and true hyphae are rarely formed while budding cells are present, and fermentation is not observed.

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