Evaluation of biocontrol capacity of Pseudomonas graminis CPA-7 against foodborne pathogens on fresh-cut pear and its effect on fruit volatile compounds
| Autor: | María L. López, Inmaculada Viñas, Lorena Zudaire, Gemma Echeverría, M.B. Iglesias, Maribel Abadias |
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| Přispěvatelé: | Producció Vegetal, Postcollita |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Listeria 030106 microbiology Population Colony Count Microbial Titratable acid Acetaldehyde medicine.disease_cause Microbiology Hexanal 040501 horticulture Pyrus 03 medical and health sciences chemistry.chemical_compound Listeria monocytogenes Salmonella Pseudomonas Antibiosis medicine Humans heterocyclic compounds Food science education Volatile Organic Compounds education.field_of_study PEAR biology Ethanol Salmonella enterica 04 agricultural and veterinary sciences biology.organism_classification Flavoring Agents Biological Control Agents chemistry Fruit Modified atmosphere Food Microbiology cardiovascular system 0405 other agricultural sciences 633 - Cultius i produccions Food Science |
| Zdroj: | IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) Repositorio Abierto de la UdL Universitad de Lleida Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | 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 ± 1 °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. Authors are grateful to the Spanish Ministry of Science and Innovation (AGL-2012-38671 research project), Secretaria d’Universitats i Recerca del Departament d’Economia i Coneixement de la Generalitat de Catalunya (AGAUR fellowship 2015-FI-B100156 (M. Belén Iglesias) and 2017-FI-B200164 (Lorena Zudaire)), European Regional Development Fund (FEDER), and CERCA Programme (Generalitat de Catalunya) for their financial support. We also thank Marina Anguera, Patricia Gálvez and Mariona Guardiola for their technical support. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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