| Title: | Evaluation of biocontrol capacity of Pseudomonas graminis CPA-7 against foodborne pathogens on fresh-cut pear and its effect on fruit volatile compounds |
| Author(s): | Iglesias MB; Lopez ML; Echeverria G; Vinas I; Zudaire L; Abadias M; |
| Address: | "Food Technology Department, University of Lleida, XaRTA-Postharvest, Agrotecnio Center, Lleida, Spain. Institute of Agrifood Research and Technology (IRTA), XaRTA-Postharvest, Lleida, Spain. Institute of Agrifood Research and Technology (IRTA), XaRTA-Postharvest, Lleida, Spain. Electronic address: isabel.abadias@irta.cat" |
| ISSN/ISBN: | 1095-9998 (Electronic) 0740-0020 (Linking) |
| Abstract: | "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 enterica and Listeria monocytogenes on fresh-cut pear under conditions that simulate its commercial application at 5?ª++/-?ª+1?ª+ degrees C (under a modified atmosphere and antioxidant solution). The quality of the fresh-cut fruit, including the ethanol and acetaldehyde contents and the volatile profile, was determined. After the storage period, the L. monocytogenes population was reduced by 1-log unit by the presence of CPA-7; however, CPA-7 was not found to have antagonistic activity against S. enterica. The fruit quality (total soluble solids content and titratable acidity) was not negatively affected by CPA-7. The ethanol and acetaldehyde contents increased during the shelf-life of the fruit regardless of the presence of CPA-7. Some volatile compounds were key factors for discriminating samples from the two groups (the control group and the group that was inoculated with CPA-7). Some components are common in the volatile profile of pear (methyl acetate, 3-methylbutyl acetate, 1-butanol, 1-hexanol, and hexanal), and thus increases in their contents could enhance consumers flavour perception" |
| Keywords: | "Acetaldehyde/analysis *Antibiosis Biological Control Agents/*pharmacology Colony Count, Microbial Ethanol/analysis Flavoring Agents/analysis Food Microbiology Fruit/chemistry/microbiology Humans Listeria monocytogenes/pathogenicity/*physiology Pseudomonas;" |
| Notes: | "MedlineIglesias, Maria Belen Lopez, Maria Luisa Echeverria, Gemma Vinas, Inmaculada Zudaire, Lorena Abadias, Maribel eng Evaluation Study England 2018/09/01 Food Microbiol. 2018 Dec; 76:226-236. doi: 10.1016/j.fm.2018.04.007. Epub 2018 Apr 27" |
