Data/hora: 20/06/2024 04:14:04

Biblioteca(s): | Embrapa Agroindústria Tropical.
Data corrente: | 16/12/2022
Data da última atualização: | 22/01/2024
Autoria: | SILVA, C. de F. B. da; MEDEIROS, S. C. DE; SOUSA, A. J. S.; COSTA, R. H. DA; XAVIER, J. G.; SANTOS, J. E. DE a.; PASTORI, P. L.; GRANGEIRO, T. B.
Afiliação: | CHRISTIANA DE FATIMA BRUCE DA SILVA, CNPAT; SUELEN CARNEIRO DE MEDEIROS, Universidade Federal do Ceará; ANTÔNIO JUSCELINO SUDÁRIO SOUSA, Universidade Federal do Ceará; REBECA HONORATO DA COSTA, Universidade Federal do Ceará; JHARINE GOMES XAVIER, Universidade Federal do Ceará; JOÃO EVANGELISTA DE ÁVILA SANTOS, Universidade Federal do Ceará; PATRIK LUIZ PASTORI, Universidade Federal do Ceará; THALLES BARBOSA GRANGEIRO, Universidade Federal do Ceará.
Título: | Identification of pathogenic fungal isolates of the Fusarium oxysporum and the Fusarium fujikuroi species complex, causing fusariosis in ornamental pineapple, and antifungal activity of elicitors.
Ano de publicação: | 2022
Fonte/Imprenta: | European Journal of Plant Pathology, v. 165, p. 125–137, Jan. 2023.
DOI: | https://doi.org/10.1007/s10658-022-02593-9
Idioma: | Inglês
Conteúdo: | Pineapples are herbaceous tropical perennial plants of the genus Ananas (Bromeliaceae). Besides the worldwide distributed edible pineapple (A. comosus var. comosus), some other botanical varieties of Ananas have been grown as ornamentals due to their conspicuous colorful inflorescences and fruits. However, knowledge about the pathogens that are associated with ornamental pineapples under field conditions is still scarce. The aim of this work was to isolate and characterize fungal pathogens infecting ornamental pineapples in Northeastern Brazil. The isolates were subjected to morphological characterization, molecular identification by DNA sequencing of the ITS/5.8S locus and pathogenicity trials. The effects of commercial elicitors on mycelial growth and conidia germination were also evaluated. Five isolates were obtained, exhibiting morphological features typical of Fusarium. Based on DNA sequences of the ITS/5.8S region, the isolates were classified as belonging to F. oxysporum (isolates MVA28, MVA85, MVE52 and MVE85) and the F. fujikuroi species complex (isolate MVE89). All isolates were able to infect ornamental pineapple leaves of hybrid D (A. comosus var. bracteatus × A. comosus var. erectifolius) and Lucidus (A. comosus var. erectifolius), producing typical fusariosis lesions. Some commercial elicitors showed in vitro antifungal activity against the Fusarium isolates, inhibiting their mycelial growth and conidia germination.
Palavras-Chave: | Fungal plant pathogens; Gravidade da doença; Identificação genética molecular; Molecular genetic identification; Patógenos fúngicos de plantas.
Thesagro: | Abacaxi; Fusarium Oxysporum; Planta Ornamental.
Thesaurus Nal: | Ananas; Disease severity; Fusarium fujikuroi; Molecular genetics; Ornamental plants; Plant genetics.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Agroindústria Tropical (CNPAT)
Exemplares: | CNPAT - (17018-1) - UPC - AP - DD -  -  -  - DIS