数字农科院2.0

Diversity And Ochratoxin A-Fumonisin Profile Of Black Aspergilli Isolated From Grapes In China

文献类型： 外文期刊

作者： Huang, X; Xiao, Z; Kong, F; Chen, AJ; Perrone, G; Wang, Z; Wang, J; Zhang, H

作者机构：

关键词： Grape; Aspergillus Section Nigri; Ochratoxin A; Fumonisin B-2

期刊名称： WORLD MYCOTOXIN JOURNAL

ISSN： 1875-0710

年卷期： 2020 年 13 卷 2 期

页码：

收录情况： JCR（2021版）

摘要： Aspergillus spp. are a common contaminant of grapes and a major source of mycotoxins. China is the largest producer of grape in the world now, however, the toxigenic Aspergillus population on grape in this country is still largely unknown. In this study, a total of 345 strains were isolated from grapes of 13 main grapevine producing regions in China. Based on calmodulin gene sequences, eight species within Aspergillus section Nigri were identified. Among them, Aspergillus tubingensis (48.7%) was predominant, followed by Aspergillus welwitschiae (20.6%) and Aspergillus aculeatinus (11%). Average of contamination level was up to 64.19%, and we found the occurrence of section Nigri species on the surface of fresh grapes was significantly influenced by the climate (P<0.05). The subtropical monsoon climate showed the highest fungal detection rate (72.45%), followed by the temperate monsoon climate (49.82%), and the lowest frequency was found in the temperate continental climate (37.23%). Regarding mycotoxin-producing capacity, 4.4% of the total tested section Nigri isolates (137) were positive for ochratoxin A (OTA) production and 59.6% were fumonisin B-2 (FB2) producers. Of those, Aspergillus carbonarius was the main OTA producer and A. welwitschiae and Aspergillus niger were the main FB2 producers with different toxigenic ability. Our results highlight the potential risk of OTA and FB2 contamination by A. carbonarius and A. welwitschiae on grape in China, respectively; management strategies should be considered for preventing and reducing the toxigenic Aspergillus and its mycotoxins.

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