INVESTIGADORES
CHULZE Sofia Noemi
congresos y reuniones científicas
Título:
Fusarium species in durum wheat from Argentina
Autor/es:
FARNOCHI, M.C; RAMIREZ, M.L; CABRERA ZALAZAR, M; PALACIOS, S.A; TORRES, A.M; CHULZE, S.N
Lugar:
Ciudad del Cabo
Reunión:
Conferencia; Mycored Africa 2011 Conference; 2011
Institución organizadora:
International Society for Mycotoxicology
Resumen:
Durum wheat (Triticum turgidum L. var. durum Desf) is cultivated in Argentina since 1950, the planted area   decline from 1969/70 with 419,700 to 54,000 ha during 2005/06 harvest season due to several factors among them lost of international markets, less yield due to fungal diseases. The main fungal species isolated are Fusarium and Alternaria species, these species are relevant for their toxigenic potential. The objectives of this work were: - to evaluate the mycoflora mainly Fusarium species isolated from durum wheat samples harvested during the 2007/08 harvest season in the South of Buenos Aires Province, Argentina, - to determine the fumonisin B1, B2 and B3 production by the main Fusarium species isolated. The mycological survey showed that all the samples were contaminated. The main species isolated belonged to Fusarium and Alternaria genera. The percentage of Fusarium contamination varied between 10 and 60 %, the main species isolated was F. proliferatum in percentage that varied between 33 and 100%. Other species isolated in lower frequency were F.equiseti, F. oxysporum, F. subglutinans, F. semitectum, F. poae, F. solani, and F. verticillioides. Out of 48 Fusarium proliferatum evaluated for fumonisin production, 45 showed at least one type of fumonisin  production in levels ranging from 6.5 to 19,000 ìg/g. Thirty two produced  the 3 fumonisins evaluated , 7 produced FB1 and FB2 , 5 produced FB1, and 1 strains was atypical and produced only FB2.   These results indicate a potential risk of natural occurrence of fumonisins in durum wheat; studies in this topic are on going.