Mentha piperita L. essential oil inactivates spoilage yeasts in fruit juices through the perturbation of different physiological functions in yeast cells.

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ID: 76884
2019
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Abstract
This study evaluated the efficacy of the essential oil from Mentha piperita L. (MPEO) to inactivate cells of the potentially spoilage yeasts Candida albicans, Candida tropicalis, Pichia anomala and Saccharomyces cerevisiae in cashew, guava, mango and pineapple juices during 72 h of refrigerated storage. Damage in different physiological functions caused by MPEO in S. cerevisiae in cashew and guava juices were investigated using flow cytometry (FC). The effects of the incorporation of an effective anti-yeast MPEO dose on sensory characteristics of juices were also evaluated. MPEO displayed minimum inhibitory concentration of 1.875 μL/mL against all tested yeasts. A >5 log reduction in counts of C. albicans, P. anomala and S. cerevisiae was observed in cashew and guava juices with 7.5 and 3.75 μL/mL MPEO. Tested MPEO concentrations (1.875, 3.75 and 7.5 μL/mL) were not effective to cause >5 log reduction in counts of target yeasts in mango and pineapple juices during 72 h of exposure. Incorporation of 1.875 μL/mL MPEO in cashew and guava juices strongly compromised membrane permeability, membrane potential, enzymatic activity and efflux pump activity in S. cerevisiae cells. This same MPEO concentration did not affect appearance, odor and viscosity in fruit juices, but negatively affected their taste and aftertaste. These results show the efficacy of MPEO to inactivate potentially spoilage yeasts in fruit juices through disturbance of different physiological functions in yeast cells. However, the combined use of MPEO with other technologies should be necessary to decrease its effective anti-yeast dose in fruit juices and, consequently, the possible negative impacts on specific sensory properties of these products.
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almeida2019menthafood Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Almeida, Erika Tayse da Cruz;de Souza, Geany Targino;de Sousa Guedes, Jossana Pereira;Barbosa, Isabella Medeiros;de Sousa, Cristina Paiva;Castellano, Lúcio Roberto Cançado;Magnani, Marciane;de Souza, Evandro Leite;
Journal food microbiology
Year 2019
DOI
S0740-0020(18)30701-9
URL
Keywords
Antimicrobial activity Essential oil flow cytometry cell damage peppermint

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