Data/hora: 09/06/2024 18:28:46

Provedor de dados: | 65
País: | Brazil
Título: | Caenorhabditis elegans as an indicator of toxicity of Bacillus thuringiensis strains to Meloidogyne incognita race 3
Autores: | Montalvão,Sandro Coelho Linhares; Castro,Marcelo Tavares de; Soares,Carlos Marcelo Silveira; Blum,Luiz Eduardo Bassay; Monnerat,Rose Gomes.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Biocontrol; Phytonematode; Root-knot nematode; Rhizobacteria.
Resumo: | ABSTRACT:  The cotton plant (Gossypium hirsutum) is affected by several diseases of economic importance, among them root-knot nematode (Meloidogyne incognita races 3 and 4). Methods to control this disease include the application of nematicides, solarization, deep plowing, crop rotation and use of antagonistic microorganisms. Among species of Bacillus, there are strains that act as bioregulators and antagonists of several pathogens. Tests to identify these strains are hampered by the difficulty of obtaining large populations of the pathogen and by the time of execution of the in vivo tests that should be conducted for about 90 days. The objective of this research was to compare the toxicity of B. thuringiensis strains to two nematodes, M. incognita and Caenorhabditis elegans, evaluating the possibility of using C. elegans as an indicator for the selection of strains with biocontrol potential against M. incognita. Therefore, the toxicity of nine B. thuringiensis strains on C. elegans and M. incognita was evaluated under laboratory and greenhouse conditions. Most strains toxic to C. elegans in vitro were also toxic to M. incognita, and three of them (S906, S1192, S2036) significantly reduced the populations of the two nematodes. The toxic effect of B. thuringiensis strains on C. elegans was like that reported for the same bacterial isolates on M. incognita in vivo. These results suggested that it is plausible to use C. elegans as an indicator of toxicity for selection of B. thuringiensis strains toxic to M. incognita.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700151
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20170712
Formato: | text/html
Fonte: | Ciência Rural  v.48 n.7 2018
Fonte: | info:eu-repo/semantics/openAccess