resumo
Although new storage technologies have been emerging in recent years, preservation of pear (Pyrus communis L.) remains a challenge for suppliers. Maintenance of desired organoleptic properties throughout cold storage using non-chemical strategies has been investigated and the use of edible coatings has shown potential to delay fruit quality deterioration during cold storage. Thus, the objective of this study is to evaluate the impact of pectin coatings including plant extracts, in Rocha pear (Pyrus communis L. cv. Rocha) preservation. A four-month pilot scale assay was performed in both dynamic controlled atmosphere (DCA) (-0.5 degrees C, 0.5% O-2, and 0.4% CO2) and normal atmospheric (NA) conditions (2 degrees C). For each storage condition, the following three coatings were tested: pectin (3% w/v) (PCT), pectin (3% w/v) + strawberry tree leaves extract (9.5 mg/mL) (CT1), and pectin (3% w/v) + apple pomace extract (16 mg/mL) (CT2). Volatile compounds, potentially related to aroma or ripening status of Rocha pear, were monitored alongside with conjugated trienols (CTs) and maturity parameters. The combination of DCA conditions and the application of pectin coatings were able to reduce the release of Rocha pear volatiles associated with ripening status, (particularly esters and sesquiterpenes), as well as reduce CTs, which could contribute to the preservation of Rocha pear for longer periods.
palavras-chave
2-DIMENSIONAL GAS-CHROMATOGRAPHY; SUPERFICIAL SCALD; EDIBLE COATINGS; CONJUGATED TRIENOLS; VOLATILE COMPOUNDS; ALPHA-FARNESENE; QUALITY; FRESH; STORABILITY; GC
categoria
Food Science & Technology
autores
Fonseca, AMA; Dias, C; Amaro, AL; Isidoro, N; Pintado, M; Silvestre, AJD; Rocha, SM
nossos autores
Alexandre Miguel Alves Fonseca
Estudante de doutoramento
Armando Jorge Domingues Silvestre
Professor Catedráticoagradecimentos
This work received external funding of the project ReStoragePear grant number 17777, supported by the COMPETE Operational Programme (COMPETE 2020) under the PORTUGAL 2020 Partnership Agreement through the European Regional Development Fund (ERDF).