Data/hora: 23/05/2024 11:12:27

Biblioteca(s): | Epagri-Sede.
Tipo da produção científica: | Resumo em Anais de Congresso
Data corrente: | 27/11/2018
Data da última atualização: | 27/11/2018
Autoria: | BOGO, A.; PIVA, C.; WELTER, L. J.; NODARI, R. O.; GOMES, B.; MICHELSKI, V.; KLABUNDE, G. H. F.
Título: | Pestalotiopsis spp. causing necrotic leaf spot on grapevines in southern Brazil.
Ano de publicação: | 2018
Fonte/Imprenta: | In: INTERNATIONAL HORTICULTURAL CONGRESS, 30., 2018, Turquia. Abstracts... Turquia: International Society for Horticultural Science, 2018. p. 27-28.
Idioma: | Inglês

Conteúdo:

Many species of the genus Pestalotiopsis are common in tropical and temperate regions and are
often isolated as endophytic, saprophytic or pathogenic. There are few reports of Pestalotiopsis spp.
as a primary disease in grapevine, especially in typical symptoms of anthracnose. Recently,
Pestalotiopsis has been reported in South Korea, Australia and the USA causing grape diseases in
branches, woody tissue, fruits, flowers and leaves, being the second most commonly isolated fungus
of grapevine cancers in Texas/USA. The present study aimed to characterize the occurrence of
Pestalotiopsis spp. causing anthracnose symptoms in grape leaves, branches and fruits at southern
Brazil. Samples of grapevine plant tissues (Vitis vinifera L.) with typical symptoms of anthracnose
were collected in 21 municipalities of the three southern Brazilian states from November 2013 to
March 2015. The pathogen was isolated in potato agar dextrose culture medium and morphological
characterization of the isolates as size of the conidia (width and length), size and number of apical
appendages, growth rate index and final colony diameter were assessed. The pathogenicity of the
isolates were tested on grape leaves and fruits. Data were submitted to analysis of variance and the
means compared by the Scott Knott test at 5% probability of error and the isolates grouped by
multivariate analysis. The ITS genomic region of one representative isolates was sequenced. The
isolates showed morphological variation and were distributed into five groups. Comparison of the
nucleotide sequence obtained for the isolates through BLAST and phylogenetic analysis confirmed
the presence of Pestalotiopsis spp., suggesting the presence of more than one species of the genus.
The pathogenicity test confirmed the ability of the isolates to cause grape leaf lesions and fruit rot.
This study represents the first report of the identification and characterization of the genus 
Pestalotiopsis causing diseases in grapevine in southern Brazil using morphological and molecular
approaches.

Palavras-Chave: | ITS genomic region; morphological and molecular features; pathogenicity; Vitis vinifera.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_41689.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (103045-1) - UPC - PL - DD -  -  -  - DIS