Toxigenic profile of Alternaria species isolated from soybean seeds.

OVIEDO M.S; BARROS G.G.; RAMIREZ M.L.; CHULZE S.N.

Merida Mexico

Congreso; IV Congreso Latinoamericano de Micotoxicología; 2010

Sociedad Latinoamericana de Micotoxicologia

Soybean (Glycine max L. Merr.) is an Asiatic leguminous plant cultivated in many parts of the world for its oil and proteins. Soybean is often attacked by fungal during cultivation, or post-harvest (in transit or in storage), significantly affecting its productivity. Alternaria and Fusarium species are the most commonly isolated fungi from soybean in Argentina and in other regions of the world (Boca et al., 2003; Broggi et al., 2007; Gally et al., 2006; Roy et al., 2000). Alternaria species are well known for the production of toxic secondary metabolites, some of which are powerful mycotoxins that have been implicated in the development of human esophageal cancer (Thomma 2003). Among these metabolites with mammalian toxicity are alternariol (AOH), alternariol monomethyl ether (AME) (Ostry 2008; Logrieco et al., 2009). Recently have been reported that AOH and AME posses cytotoxic, genotoxic, estrogenic and mutagenic properties in vitro (Brugger et al., 2006; Fehr et al., 2009; Lehmann et al., 2006; Wollenhaupt et al., 2008), and there is also some evidence of carcinogenic properties (Yekeler et al., 2001). In previous studies we have showed natural occurrence of AOH and AME on soybean seeds harvested in Argentina (Oviedo et al., 2009). Considering the extensive used of soybean in the manufacture of animal and human foodstuffs the risk of both populations arising from continuing low-level exposure to AOH and AME should be taken into account. Aim. To determine the toxigenic profile of Alternaria species isolated from soybean seeds harvested in Argentina To determine the toxigenic profile of Alternaria species isolated from soybean seeds harvested in Argentina