Biopreservation of fresh-cut pear using Lactobacillus rhamnosus GG and effect on quality and volatile compounds
Iglesias Valenzuela, María Belén
MetadataShow full item record
In recent years, the consumption of minimally processed fruit has increased. However, unfortunately, these products could be an appropriate vehicle for the transmission of foodborne pathogens. In this study, the antagonistic capacity of the probiotic strain Lactobacillus rhamnosus GG against a cocktail of 5 serovars of Salmonella and 5 serovars of Listeria monocytogenes on fresh-cut pear at conditions simulating commercial application was assessed. Moreover, its effect on fruit quality, particularly on the volatile profile, was determined, during 9 days of storage at 5 °C. L. monocytogenes population was reduced by approximately 1.8 log-units when co-inoculated with L. rhamnosus GG. However, no effect was observed in Salmonella. Fruit quality (soluble solids content and titratable acidity) did not change when the probiotic was present. A total of 48 volatile compounds were identified using gas chromatography. Twelve of the compounds allowed to discriminate L. rhamnosus GG-treated and untreated pears. Considering their odour descriptors, their increases could be positive in the flavour perception of L. rhamnosus GG-treated pear. The probiotic was able to control L. monocytogenes population on fresh-cut pear, which could be a vehicle of probiotic microorganisms as quality of fruit was not affected when the probiotic was present.
Is part ofLWT - Food Science And Technology, 2018, vol. 87, p. 339-345
European research projects
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Evaluation of biocontrol capacity of Pseudomonas graminis CPA-7 against foodborne pathogens on fresh-cut pear and its effect on fruit volatile compounds Iglesias Valenzuela, María Belén; López Fructuoso, Mª Luisa; Echeverría Cortada, Gemma; Viñas Almenar, Inmaculada; Zudaire Villanueva, Lorena; Abadias i Sero, Mª Isabel (Elsevier, 2018)The application of microorganisms to control the growth of foodborne pathogens is an alternative to the use of chemical additives. In this work, Pseudomonas graminis CPA-7 was tested as a biocontrol agent against Salmonella ...
Evaluation of postharvest calcium treatment and biopreservation with Lactobacillus rhamnosus GG on the quality of fresh‐cut ‘Conference’ pears Zudaire Villanueva, Lorena; Viñas Almenar, Inmaculada; Plaza, Lucía; Iglesias Valenzuela, María Belén; Abadias i Sero, Mª Isabel; Aguiló-Aguayo, Ingrid (WileySociety of Chemical Industry, 2018)BACKGROUND Biological preservation with probiotic bacteria has arisen as an alternative to control the growth of foodborne pathogens on food. The objective of this work was to evaluate the effect of postharvest calcium ...
Adhesion and invasion of Listeria monocytogenes and interaction with Lactobacillus rhamnosus GG after habituation on fresh-cut pear Iglesias Valenzuela, María Belén; Viñas Almenar, Inmaculada; Colás Medà, Pilar; Collazo Cordero, Cyrelys; Serrano Casasola, José Carlos Enrique; Abadias i Sero, Mª Isabel (Elsevier Ltd, 2017-07)Several foods are carriers of probiotic bacteria. Most species of the genus Lactobacillus are probiotics and common inhabitants of the human gastrointestinal tract. It is known that they contribute to the health of ...