Back to Search
Start Over
Efficacy of gaseous ozone to counteract postharvest table grape sour rot.
- Source :
-
Food Microbiology . Sep2017, Vol. 66, p190-198. 9p. - Publication Year :
- 2017
-
Abstract
- This work aims at studying the efficacy of low doses of gaseous ozone in postharvest control of the table grape sour rot, a disease generally attributed to a consortium of non- Saccharomyces yeasts (NSY) and acetic acid bacteria (AAB). Sour rot incidence of wounded berries, inoculated with 8 NSYstrains, or 7 AAB, or 56 yeast-bacterium associations, was monitored at 25 °C up to six days. Sour rot incidence in wounded berries inoculated with yeast-bacterium associations resulted higher than in berries inoculated with one single NSY or AAB strain. Among all NSY-AAB associations, the yeast-bacterium association composed of Candida zemplinina CBS 9494 (Cz) and Acetobacter syzygii LMG 21419 (As) showed the highest prevalence of sour rot; thus, after preliminary in vitro assays, this simplified As-Cz microbial consortium was inoculated in wounded berries that were stored at 4 °C for ten days under ozone (2.14 mg m −3 ) or in air. At the end of cold storage, no berries showed sour-rot symptoms although ozonation mainly affected As viable cell count. After additional 12 days at 25 °C, the sour rot index of inoculated As-Cz berries previously cold-stored under ozone or in air accounted for 22.6 ± 3.7% and 66.7 ± 4.5%, respectively. Molecular analyses of dominant AAB and NSY populations of both sound and rotten berries during post-refrigeration period revealed the appearance of new strains mainly belonging to Gluconobacter albidus and Hanseniaspora uvarum species, respectively. Cold ozonation resulted an effective approach to extend the shelf-life of table grapes also after cold storage. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ACETIC acid
*BERRY harvesting
*OZONIZATION
*TABLE grapes
*COLD storage
Subjects
Details
- Language :
- English
- ISSN :
- 07400020
- Volume :
- 66
- Database :
- Academic Search Index
- Journal :
- Food Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 123310931
- Full Text :
- https://doi.org/10.1016/j.fm.2017.05.001