Supressão da murcha de fusário em tomateiro por rizobactérias do gênero Bacillus
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Data
2015-09-30
Título da Revista
ISSN da Revista
Título de Volume
Editor
Evandro Novaes
Resumo
Vascular wilting in tomato plants constitutes an important
group of diseases incited by soil inhabiting pathogens, especially
Fusarium oxysporum f. sp. lycopersici, that causes significant
production losses. The introgression of genes that express specific
resistance is considered the main control method, however,
due to the rapid emergence of races that suppress resistance,
biocontrol has been presented as an option to be integrated with
genetic control methods. This study aimed at evaluating the
ability of rhizobacteria isolates, especially from the Bacillus
genus, as biological control agents of Fusarium wilt in tomato
plants. The laboratory assay was carried out to verify the ability
of the isolates in acting as inhibitors of mycelial growth, besides
detecting the genes involved in the expression of polypeptides with
antimicrobial action. In the greenhouse, the assay comprised of
microbiolized seeds and addition of a suspension of propagules
of each rhizobacteria to the soil at the moment of transplanting
the tomato seedlings. All the rhizobateria isolates showed variable
control levels of the pathogen in vitro. The UFG-07 and UFG-10
isolates, with high similarity with Bacillus subtilis and Bacillus
circulans, excelled in the disease suppression. PCR results detected
target genes for expression of polypeptides, what reinforces the
hypothesis of action of antimicrobial substances in biocontrol.
Descrição
v. 45, n. 3, p. 356-363, jul./set. 2015.
Palavras-chave
Fusarium oxysporum, Solanaceae, Metabólitos secundários, Secondary metabolites
Citação
CARRER FILHO, Renato; DIANESE, Érico de Campos; CUNHA, Marcos Gomes da. Supressão da murcha de fusário em tomateiro por rizobactérias do gênero Bacillus. Pesquisa Agropecuária Tropical, Goiânia, v. 45, n. 3, p. 356-363, jul./set. 2015. Disponível em: < http://www.revistas.ufg.br/index.php/pat/article/view/35397/19024>.