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Occurrence of ochratoxin A producing fungi in wine and table grapes in Israel
Year:
2006
Authors :
Danshin, Anna
;
.
Guzev, Ludmila
;
.
Lichter, Amnon
;
.
Ziv, Sarit
;
.
Volume :
111
Co-Authors:
Guzev, L., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Danshin, A., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Ziv, S., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Lichter, A., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:
A 3-year survey was conducted to assay the number of Aspergillus Section Nigri isolates and in vitro ochratoxin A (OTA) production capacity in 10 vineyards in Israel. The survey included field sampling of two wine cultivars, 'Sauvignon Blanc' and 'Cabernet Sauvignon' as well as the table grape cultivar 'Superior'. A total of 2114 isolates were analyzed and of those 161 isolates were shown to produce OTA. The major finding was that Aspergillus carbonarius (336 tested strains) is the most consistent producer of OTA, with approximately 35% of the isolates identified as positive in vitro. In comparison, 3.1% of other isolates from the Aspergillus niger aggregate (of 1432 strains) produced OTA in vitro. In contrast, none of the 346 tested strains with a uniseriate head morphology produced OTA. The incidence of infected berries was very low before veraison, while at harvest, this frequency was twice as high. In general, the composition of black Aspergilli did not differ during berry development. Generally, more OTA-producing isolates were isolated from the surface of table grapes cv. 'Superior' compared to 'Sauvignon Blanc'. None of the samples collected at harvest contained traces of OTA in the juice. This study shows that grapes in Israel are contaminated with ochratoxigenic species which represent a risk of OTA contamination. © 2006 Elsevier B.V. All rights reserved.
Note:

PP. S67-S71

Related Files :
Aspergillus
Food Contamination
food microbiology
fungi
Israel
Vitis
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More details
DOI :
10.1016/j.ijfoodmicro.2006.03.003
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24363
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:06
Scientific Publication
Occurrence of ochratoxin A producing fungi in wine and table grapes in Israel
111
Guzev, L., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Danshin, A., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Ziv, S., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Lichter, A., Department of Postharvest Science, ARO, the Volcani Center, POB 6, Bet Dagan, 50250, Israel
Occurrence of ochratoxin A producing fungi in wine and table grapes in Israel
A 3-year survey was conducted to assay the number of Aspergillus Section Nigri isolates and in vitro ochratoxin A (OTA) production capacity in 10 vineyards in Israel. The survey included field sampling of two wine cultivars, 'Sauvignon Blanc' and 'Cabernet Sauvignon' as well as the table grape cultivar 'Superior'. A total of 2114 isolates were analyzed and of those 161 isolates were shown to produce OTA. The major finding was that Aspergillus carbonarius (336 tested strains) is the most consistent producer of OTA, with approximately 35% of the isolates identified as positive in vitro. In comparison, 3.1% of other isolates from the Aspergillus niger aggregate (of 1432 strains) produced OTA in vitro. In contrast, none of the 346 tested strains with a uniseriate head morphology produced OTA. The incidence of infected berries was very low before veraison, while at harvest, this frequency was twice as high. In general, the composition of black Aspergilli did not differ during berry development. Generally, more OTA-producing isolates were isolated from the surface of table grapes cv. 'Superior' compared to 'Sauvignon Blanc'. None of the samples collected at harvest contained traces of OTA in the juice. This study shows that grapes in Israel are contaminated with ochratoxigenic species which represent a risk of OTA contamination. © 2006 Elsevier B.V. All rights reserved.

PP. S67-S71

Scientific Publication
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