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Control of Hanseniaspora osmophila and Starmerella bacillaris in strawberry juice using blueberry polyphenols
LWT - Food Science and Technology ( IF 6 ) Pub Date : 2018-02-09 , DOI: 10.1016/j.lwt.2018.02.006
Claudia Verónica Vallejo , Osvaldo Daniel Delgado , Graciela Celestina Rollán , María José Rodríguez-Vaquero

The aims of the present work were to isolate and identify the principal yeasts present in spoiled Argentine strawberry juice, identify polyphenols present in four blueberry cultivars and use these blueberry extracts in the control of yeasts using strawberry juice as food system model. Hanseniaspora osmophila and Starmerella bacillaris were identified for the first time in Argentine strawberry juice. The blueberry extracts assayed showed antifungal activity against H. osmophila and S. bacillaris through individual phenolic compounds such as quercetin, kaempferol and chlorogenic, ρ-coumaric and ellagic acid. The cytotoxicity assay demonstrated that the blueberries were not toxic to humans and that they did not modify the sensorial qualities of strawberry juice. No viable S. bacillaris and H. osmophila cells were detected after 7 days in strawberry juice supplemented with 150 μg/ml Blue Crisp or Millennium extract, inoculated with the isolated spoilage yeasts and conserved at 4 °C. This is the first evidence of S. bacillaris and H. osmophila in spoiled Argentine strawberry juice and blueberry extracts could be a good natural and non-toxic alternative to prevent growth of these yeasts. Blueberry extracts could be feasible alternatives to improve the microbiological quality without impact on the organoleptic properties of polyphenol-enriched strawberry juice.



中文翻译:

用蓝莓多酚控制草莓汁中的汉斯氏鼻链菌芽孢杆菌

本工作的目的是分离和鉴定变质的阿根廷草莓汁中存在的主要酵母,鉴定四个蓝莓品种中存在的多酚,并使用草莓汁作为食品系统模型,将这些蓝莓提取物用于酵母的控制中。在阿根廷草莓汁中首次鉴定到了汉斯氏假单胞菌芽孢杆菌。所分析的蓝莓提取物显示出针对嗜血菌细菌链球菌的抗真菌活性通过单独的酚类化合物,例如槲皮素,山奈酚和绿原酸,对香豆酸和鞣花酸。细胞毒性试验表明,蓝莓对人体无毒,并且没有改变草莓汁的感官品质。在补充了150μg/ ml Blue CrispMillennium提取物的草莓汁中接种了分离的腐败酵母并在4°C保存的7天后,未检测到活的链球菌嗜酸链球菌细胞。这是细菌性链球菌嗜血链球菌的第一个证据变质的阿根廷草莓汁和蓝莓提取物中的维生素B可能是阻止这些酵母菌生长的良好天然无毒替代品。蓝莓提取物可能是提高微生物质量而不影响富含多酚的草莓汁感官特性的可行替代方法。

更新日期:2018-02-09
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