curtobacterium flaccumfaciens pv. flaccumfaciens detection in bean seeds using a semi-selective culture medium detecção de curtobacterium flaccumfaciens pv. flaccumfaciens em sementes de feijoeiro utilizando meio de cultura semi-seletivo

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ID: 203473
2006
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Abstract
The bacterial wilt caused by Curtobacterium flaccumfaciens pv. flaccumfaciens is currently considered one of the most important bacterial bean disease in Brazil. One of the most effective control methods against this disease is the use of healthy seeds. However, no methods are known that could be routinely used to detect this bacterium in bean seeds under Brazilian condition. The aim of this work was to evaluate qualitative and quantitative detection methods for Curtobacterium flaccumfaciens pv. flaccumfaciens in naturally-infected bean seeds, and the detection of this pathogen in thirty bean seed samples, by sowing onto a semi-selective culture medium the leachate obtained from soaked bean seeds. Both the qualitative and quantitative methods were effective for detecting the presence of the bacteria in the seeds samples analysed. The qualitative method proved more practical for rotine use; of the thirty bean seed samples analyzed by this method, fifty percent were infected with Curtobacterium flaccumfaciens pv. flaccumfaciens.
Atualmente, a murcha-de-curtobacterium, causada por Curtobacterium flaccumfaciens pv. flaccumfaciens, é considerada uma das principais doenças baterianas da cultura do feijoeiro, no Brasil. Um dos métodos eficazes de controle desta doença é o emprego de sementes sadias. Entretanto, não se tem conhecimento de métodos que possam ser utilizados em rotina para o isolamento desta bactéria em sementes de feijoeiro. O presente trabalho teve por objetivo avaliar os métodos qualitativos e quantitativos de isolamento de Curtobacterium flaccumfaciens pv. flaccumfaciens em sementes de feijoeiro naturalmente infectadas e a detecção deste patógeno em trinta amostras de sementes de feijoeiro, pela semeadura do líquido de maceração das sementes em meio de cultura semi-seletivo. Tanto o método quantitativo quanto o quantitativo foram eficazes em detectar a presença da bactéria nas amostras de sementes analisadas. O método qualitativo mostrou-se mais prático para o uso em rotina e das trinta amostras de sementes de feijoeiro analisadas por este método cinqüenta porcento delas estavam infectadas com Curtobacterium flaccumfaciens pv. flaccumfaciens.
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Authors ;Antonio Carlos Maringoni;Renata de Cassia Camara
Journal ieee software
Year 2006
DOI
10.1590/S1517-83822006000400009
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