Evaluation of indigenous bacterial strains for biocontrol of the frogeye leaf spot of soya bean caused by Cercospora sojina

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Aims: Assessment of biological control of Cercospora sojina, causal agent of frogeye leaf spot [FLS] of soya bean, using three indigenous bacterial strains, BNM297 [Pseudomonas fluorescens], BNM340 and BNM122 [Bacillus amyloliquefaciens]. Methods and Results: From cultures of each bacterial strain,...

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Detalles Bibliográficos
Otros Autores: Simonetti, Ester, Carmona, Marcelo Aníbal, Scandiani, María Mercedes, García, A. F., Luque, A. G., Correa, Olga Susana, Balestrasse, Karina Beatriz
Formato: Artículo
Lenguaje:Inglés
Materias:
BIOLOGICAL CONTROL
FROGEYE LEAF SPOT
ANTAGONISM
ANTIMICROBIAL ACTIVITY
BACTERIUM
FUNGAL DISEASE
GREENHOUSE ECOSYSTEM
INHIBITION
SEEDLING
ANTIFUNGAL ACTIVITY
BACTERIAL CELL
BACTERIAL STRAIN
BACTERIUM CULTURE
CELL SUSPENSION
CONTROLLED STUDY
DISEASE SEVERITY
FUNGAL SPORE GERMINATION
FUNGUS
GREENHOUSE
IN VITRO STUDY
LEAF LITTER
LEAF SPOT
MYCELIAL GROWTH
NONHUMAN
RHIZOSPHERE FUNGUS
SOYBEAN
SUPERNATANT
ASCOMYCOTA
BACILLUS
PLANT DISEASES
PLANT LEAVES
PSEUDOMONAS FLUORESCENS
SOYBEANS
BACILLUS [BACTERIUM]
BACILLUS AMYLOLIQUEFACIENS
BACTERIA [MICROORGANISMS]
CERCOSPORA SOJINA
FUNGI
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2012Simonetti2.pdf
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Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
Descripción
Sumario:Aims: Assessment of biological control of Cercospora sojina, causal agent of frogeye leaf spot [FLS] of soya bean, using three indigenous bacterial strains, BNM297 [Pseudomonas fluorescens], BNM340 and BNM122 [Bacillus amyloliquefaciens]. Methods and Results: From cultures of each bacterial strain, cell suspensions and cell-free supernatants were obtained and assayed to determine their antifungal activity against C. sojina. Both mycelial growth and spore germination in vitro were more strongly inhibited by bacterial cell suspensions than by cell-free supernatants. The Bacillus strains BNM122 and BNM340 inhibited the fungal growth to a similar degree [I ~52-53 percent], while cells from P. fluorescens BNM297 caused a lesser reduction [I ~32-34 percent] in the fungus colony diameter. The foliar application of the two Bacillus strains on soya bean seedlings, under greenhouse conditions, significantly reduced the disease severity with respect to control soya bean seedlings and those sprayed with BNM297. This last bacterial strain was not effective in controlling FLS in vivo. Conclusions: Our data demonstrate that the application of antagonistic bacteria may be a promising and environmentally friendly alternative to control the FLS of soya bean. Significance and Impact of the Study: To our knowledge, this is the first report of biological control of C. sojina by using native Bacillus strains.
ISSN:0266-8254

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