ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Postharvest biocontrol agents: key mechanisms of action for enhancement of their activity and potential for prevention/detoxification of mycotoxin accumulation in apples and wine grapes

Cantoria R.; Caputo L.; Morena V.; De Curtis F. and De Cicco V.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.113

2004

บทคัดย่อ

  Biological control of postharvest diseases based o­n antagonist yeasts is a promising alternative/integration to chemical approach. However, higher reliability of performances of these biocontrol agents (BCAs) is needed for encouraging their utilisation and commercialisation. For this purpose, knowledge of their mechanisms of action is crucial to identify pivotal traits, whose enhancement could boost BCAs’activity. Evidence will be shown o­n the role of resistance of postharvest BCAs to oxidative stress as a key mechanism to successfully outcompete wound pathogens such as Botrytix cinerea and Penicillium expansum in stored apples, and as a potential enhancer of BCAs’activity.

Besides their use for reducing chemicals in the control of fungal diseases, some BCAs display a potential activity in addressing another major issue of food safety, recently considered by U.S. and EU legislation (EU Regulations 472/2002 and 1425/2003): contamination of apple-based food products destined to childhood with Patulin, mycotoxin produced by P. ezpansum,and contamination of wine with Ochratoxin A, produced by Aspergillus carbonarius, fungal pathogen of grape. Evidence is presented showing the in vitro and in vivo – i.e. during antagonistic interaction with the mycotoxigenic fungus – active reduction of these mycotoxins by BCAs