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.