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Morphology, physiology, and virulence of Bipolaris sorokiniana isolates.
Poloni, A; Pessi, I S; Frazzon, A P G; Van der Sand, S T.
Afiliação
  • Poloni A; Laboratório de Micologia Ambiental, Departamento de Microbiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, CEP 90050-170, Porto Alegre, RS, Brazil.
Curr Microbiol ; 59(3): 267-73, 2009 Sep.
Article em En | MEDLINE | ID: mdl-19484298
Bipolaris sorokiniana is a phytopathogenic fungus that causes diseases in cereal crops. The high morphological, physiological, and genetic variability makes the control of this fungus a difficult task. The aim of this work was to study the virulence, morphological, and physiological variability of B. sorokiniana isolates. For this, 35 B. sorokiniana isolates from different geographic regions in Brazil and other countries were used. The isolates were evaluated for their morphological variability, considering mycelium color, sector formation, and growth rate. Based on these morphological characteristics, the isolates were grouped in five different morphological groups. Extracellular enzymes activity in solid medium, virulence in wheat seeds and seedlings, and analysis of total proteins by SDS-PAGE were evaluated for all isolates. Variations among the isolates were found for enzymatic activity, and esterase was the enzyme that showed the highest activity indices. The results obtained from infection of seeds and seedlings showed that isolates from the same geographical region and morphological group had different degrees of virulence. The total protein profile shown by the isolates varied in the number of bands and intensity, where some of them may be used to characterize the specie.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doenças das Plantas / Ascomicetos / Triticum País/Região como assunto: America do sul / Brasil Idioma: En Revista: Curr Microbiol Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doenças das Plantas / Ascomicetos / Triticum País/Região como assunto: America do sul / Brasil Idioma: En Revista: Curr Microbiol Ano de publicação: 2009 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos