Effect of thyme essential oil and Lactococcus lactis CBM21 on the microbiota composition and quality of minimally processed lamb's lettuce.

Autor: Siroli L; Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Campus of Food Science, Piazza Goidanich 60, 47521 Cesena, Italy., Patrignani F; Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Campus of Food Science, Piazza Goidanich 60, 47521 Cesena, Italy., Serrazanetti DI; Interdepartmental Center for Industrial Agri-food Research, University of Bologna, Piazza Goidanich 60, 47521 Cesena FC, Italy., Vernocchi P; Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Campus of Food Science, Piazza Goidanich 60, 47521 Cesena, Italy; Human Microbiome Unit, Bambino Gesù Children Hospital, IRCCS, Viale di San Paolo 15, 00146 Rome, Italy., Del Chierico F; Human Microbiome Unit, Bambino Gesù Children Hospital, IRCCS, Viale di San Paolo 15, 00146 Rome, Italy., Russo A; Human Microbiome Unit, Bambino Gesù Children Hospital, IRCCS, Viale di San Paolo 15, 00146 Rome, Italy., Torriani S; Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy., Putignani L; Human Microbiome Unit, Bambino Gesù Children Hospital, IRCCS, Viale di San Paolo 15, 00146 Rome, Italy; Unit of Parasitology, Bambino Gesù Children Hospital, IRCCS, Piazza Sant'Onofrio 4, 00165 Rome Italy., Gardini F; Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Campus of Food Science, Piazza Goidanich 60, 47521 Cesena, Italy; Interdepartmental Center for Industrial Agri-food Research, University of Bologna, Piazza Goidanich 60, 47521 Cesena FC, Italy., Lanciotti R; Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Campus of Food Science, Piazza Goidanich 60, 47521 Cesena, Italy; Interdepartmental Center for Industrial Agri-food Research, University of Bologna, Piazza Goidanich 60, 47521 Cesena FC, Italy. Electronic address: rosalba.lanciotti@unibo.it.
Jazyk: angličtina
Zdroj: Food microbiology [Food Microbiol] 2017 Dec; Vol. 68, pp. 61-70. Date of Electronic Publication: 2017 Jun 27.
DOI: 10.1016/j.fm.2017.06.017
Abstrakt: The main aim of this work was to evaluate, at pilot scale in an industrial environment, the effects of the biocontrol agent Lactococcus lactis CBM21 and thyme essential oil compared to chlorine, used in the washing step of fresh-cut lamb's lettuce, on the microbiota and its changes in relation to the time of storage. The modification of the microbial population was studied through pyrosequencing in addition to the traditional plate counts. In addition, the volatile molecule and sensory profiles were evaluated during the storage. The results showed no significant differences in terms of total aerobic mesophilic cell loads in relation to the washing solution adopted. However, the pyrosequencing data permitted to identify the genera and species able to dominate the spoilage associations over storage in relation to the treatment applied. Also, the analyses of the volatile molecule profiles of the samples during storage allowed the identification of specific molecules as markers of the spoilage for each different treatment. The sensory analyses after 3 and 5 days of storage showed the preference of the panelists for samples washed with the combination thyme EO and the biocontrol agent. These samples were preferred for attributes such as flavor, acceptability and overall quality. These results highlighted the effect of the innovative washing solutions on the quality of lettuce through the shift of microbiota towards genera and species with lower potential in decreasing the sensory properties of the product.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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