INVESTIGADORES
BARROS German Gustavo
artículos
Título:
Genetic diversity within Aspergillus flavus strains isolated from peanut-cropped soils in Argentina
Autor/es:
BARROS, GERMÁN; TORRES, ADRIANA; RODRIGUEZ, MARÍA; CHULZE, SOFÍA
Revista:
SOIL BIOLOGY AND BIOCHEMISTRY
Editorial:
Elsevier Science
Referencias:
Lugar: Amsterdam. The Nethelands.; Año: 2006 p. 145 - 152
ISSN:
0038-0717
Resumen:
Abstract: The genetic diversity of Aspergillus flavus populations isolated from the peanut-cropped soils in the peanut-growing region at Cordoba Province was evaluated by analysis of vegetative compatibility group (VCG). VCGs were determined through complementation assays between nitrate-nonutilizing (NNO) mutants. Fifty-six VCGs were identified from 100 isolates. Twenty-five VCGs contained two or more isolates and 31 VCGs contained only a single isolate. In general, there were significant differences among VCGs in aflatoxin and CPA production. One VCG group included a single atoxigenic strain since it was neither aflatoxin nor cyclopiazonic acid producer. This isolate could be useful as a biological control agent, since it was unable to form a stable heterokaryon in the complementation test with the other isolates. Seven A. flavus isolated from soil were atypical because they simultaneously produced aflatoxins B, G and CPA.
