PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Antifungal activity of bacteria isolated from bat guano on pathogenic fungi of strawberries
Autor/es:
DELFINI C. D,; VILLEGAS L B; BAIGORÍ M
Lugar:
Puerto Madryn
Reunión:
Congreso; XLVI Reunión Anual. Sociedad Argentina de Investigación en Bioquímica y Biología Molecular; 2010
Institución organizadora:
Sociedad Argentina de Investigación en Bioquímica y Biología Molecular
Resumen:
Tucumán is the principal producer of strawberry of Argentine. The major phytosanitary disadvantages of this crop are the diseases produced by soil fungi. One of the most serious and common is the anthracnose caused by fungal of genus Colletotrichum. They produce the major losses both in the fruit and plant production. In previous works 6 chitinolitc bacteria isolated from bat guano (Taradita brasilensis) were characterized as belonging to Bacillus and Streptomyces genus. The aim of this work is to study the antifungal activity of these chitinolitc bacteria on fungus of Colletoctichum genus in vitro. The 6 bacteria were incubated in 3 different media: SPI- colloidal chitin, SPI-pupa and Standar nutrient during 72h, 200 rpm and at 20, 25 and 28 ºC. Supernatants of these cultures were used in inhibition tests on Colletoctichum acutatum and C.fragariae grown on potato dextrose agar. Only the bacteria of the genus Bacilllus showed to possess antifungical activity. Supernatants of B.atrophaeus PA 14 had the major capacity of inhibition of both fungi. The results suggest that this bacterium produce extracellular antifungal metabolite. B.atrophaeus PA 14 is a potential antifungical biocontrol agent for anthracnose in strawberries. This will allow the decrease of the use of chemical products and will favor the sustainable production. This work was supported by grant PIP-CONICET 297.