Study of gene expression and OTA production by Penicillium nordicum during a small-scale seasoning process of salami

Torna indietro

Abstract

Penicillium nordicum, an important and consistent producer of ochratoxin A (OTA), is a widely distributed contaminant of NaCl and protein rich food. It is usually found on dry-cured meat products and is considered the main responsible of their contamination by OTA. The aim of this work was to study the gene expression of a polyketide synthase (otapksPN), involved in P. nordicum OTA biosynthesis, and OTA production during a small-scale seasoning process. Fresh pork sausages were surface inoculated with P. nordicum and seasoned for 30 days. Gene expression and OTA production were monitored throughout the seasoning process after 4, 5, 6, 7, 10, 14, and 30 days. The expression of otapksPN gene was already detected after 4 days and increased significantly after 7 days of seasoning, reaching the maximum expression level after 10 days (1.69·104 copies/100 mg). Consistently with gene expression monitoring, OTA was detected since the 4th dayand its content increased significantly from the 7th day, reaching the maximum level after 10 days. In the late stages of seasoning process, OTA did not increase further and the number of gene copies was progressively reduced after 14 and 30 days.

Autore Pugliese

Tutti gli autori

  • Ferrara M.; Magistà D.; Epifani F.; Cervellieri S.; Lippolis V.; Gallo A.; Perrone G.; Susca A.

Titolo volume/Rivista

International journal of food microbiology

Anno di pubblicazione

2016

ISSN

0168-1605

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile