Abstract:
:Aspergillus section Nigri populations isolated from seven growing regions from Argentina were characterized by sequencing in order to identify species responsible for production of ochratoxin A (OTA) and fumonisins (FB(s)). Sequences of genes encoding calmodulin, β-tubulin, the second largest subunit of RNA polymerase II and translation elongation factor 1 alpha were analysed. The phylogenetic analysis showed the presence of six lineages: A. carbonarius, A. tubingensis, A. niger, A. japonicus, A. homomorphus and A. foetidus grouped in four major clusters. The molecular tools used allowed the identification for the first time of A. homomorphus from vineyards. OTA production confirmed the importance of A. carbonarius as the main ochratoxigenic species isolated and, to a variable degree, of A. niger and A. tubingensis, which were by far the most commonly occurring species on grapes in Argentina. The only strains able to produce OTA and fumonisins (B(2)-B(4)) belong to the A. niger cluster.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Chiotta ML,Susca A,Stea G,Mulè G,Perrone G,Logrieco A,Chulze SNdoi
10.1016/j.ijfoodmicro.2011.06.002subject
Has Abstractpub_date
2011-09-15 00:00:00pages
171-6issue
2eissn
0168-1605issn
1879-3460pii
S0168-1605(11)00337-0journal_volume
149pub_type
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