Data/hora: 08/06/2024 06:23:35

Biblioteca(s): | Embrapa Roraima.
Data corrente: | 04/04/2019
Data da última atualização: | 11/11/2019
Autoria: | VALDETARO, D. C. O. F.; HARRINGTON, T. C.; OLIVEIRA, L. S. S.; GUIMARÃES, L. M. S.; MCNEW, D. L.; PIMENTA, L. V. A.; GONCALVES, R. C.; SCHURT, D. A.; ALFENAS, A. C.
Afiliação: | Denise C. O. F. Valdetaro, Universidade Federal de Viçosa; Thomas C. Harrington, Iowa State University; Leonardo S. S. Oliveira, Universidade Federal de Viçosa; Lúcio M. S. Guimarães, Universidade Federal de Viçosa; Douglas L. McNew, Iowa State University; Lucas V. A. Pimenta, Universidade Federal de Viçosa; RIVADALVE COELHO GONCALVES, CPAF-AC; DANIEL AUGUSTO SCHURT, CPAF-RR; Acelino C. Alfenas, Universidade Federal de Viçosa.
Título: | A host specialized form of Ceratocystis fimbriata causes seed and seedling blight on native Carapa guianensis (andiroba) in Amazonian rainforests.
Ano de publicação: | 2019
Fonte/Imprenta: | Fungal Biology, v. 123, n. 2, p. 170-182, Feb. 2019.
DOI: | 10.1016/j.funbio.2018.12.001
Idioma: | Inglês
Conteúdo: | Ceratocystis fimbriata Ellis & Halsted recently was recorded causing seed and seedling blight on Carapa guianensis Aubl. (andiroba), a tree species native to the Amazon Rainforest and prized for its valuable timber and medicinal seed oil. C. fimbriata more commonly causes wilt type diseases in woody hosts, especially on non-native host trees. However, on andiroba the disease occurs on seedlings and seeds, affecting the species regeneration. We studied 73 isolates of C. fimbriata on andiroba from three regions of the Amazon Basin to see if they represented natural or introduced populations. Analysis of ITS rDNA sequences and phylogenetic analysis of mating type genes revealed new haplotypes of C. fimbriata from  the Latin American Clade that were closely related to other Brazilian populations of the fungus. In mating experiments, andiroba isolates were inter-fertile with tester strains of C. fimbriata from Brazil and elsewhere, confirming that they belong to a single biological species. Using microsatellite markers, 14 genotypes and populations with intermediate levels of genetic variability were found, suggesting that the fungus is indigenous to the Amazon Basin. Inoculation tests indicated that the andiroba isolates are host-specialized on andiroba, supporting the proposition of the special form C. fimbriata f. sp. carapa.
Palavras-Chave: | Enfermedades fungales de las plantas; Marcador microssatélite; Plantas de semilleros; Produto florestal não madeireiro (PFNM); Repeticiones de microsatélite; Semillas; Stem blight; Tizón del tallo; Variación genética.
Thesagro: | Andiroba; Carapa Guianensis; Ceratocystis Fimbriata; Doença Fúngica; Fungo; Marcador Genético; Plântula; Semente; Variação Genética.
Thesaurus Nal: | Fungal diseases of plants; Genetic markers; Genetic variation; Microsatellite repeats; Nontimber forest products; Seedlings; Seeds.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Roraima (CPAF-RR)
Exemplares: | CPAF-RR - (15862-1) - UPC - SP - DD - S2019.009 -  - S2019.009 - DIS