Mycobiota and toxicogenic Alternaria spp. strains in Malbec wine grapes from DOC San Rafael, Mendoza, Argentina

Natural occurrence and production of tenuazonic acid in wine grapes in Argentina

“…Importantly, MIC obtained for each A . alternata strain was generally in agreement with the grade of pathogenicity showed for the same strain in grapes (Prendes et al., ).…”

“…Also, a high frequency and levels of TA production in ground rice‐corn steep liquor medium by A . alternata strains have been described (Prendes, Merín, Andreoni, Ramirez, & Morata de Ambrosini, ). Moreover, we recently found high and sustained levels of TA production by three A .…”

Water activity and temperature effects on growth and mycotoxin production byAlternaria alternatastrains isolated from Malbec wine grapes

“…Also, its moderate to high pathogenicity grade in a detached berry test (grade 2 or 3), similar to the majority of the A. alternata strains isolated from Malbec grapes, was analysed during a previous study (Prendes et al . ). Cultures were maintained in 15% glycerol (v/v) at −80°C.…”

“…In addition, Alternaria alternata strains isolated from Malbec wine grape have demonstrated the in vitro ability to produce alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TA) in synthetic media (Prendes et al . ; Trinidad et al . ).…”

“…; Prendes et al . ; Tančinová et al . ), and it has been associated to grape berry rot in the field under conducive environmental conditions (Pearson and Goheen ; Cucchi and Becerra ; Kakalikova et al .…”