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Physicochemical fingerprint of Pera Rocha do Oeste. A PDO pear native from Portugal
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Orientador(es)
Resumo(s)
“Pera Rocha do Oeste” is a pear (Pyrus communis L.) variety native from Portugal with a
Protected Designation of Origin (PDO). To supply the world market for almost all the year, the fruits
are kept under controlled storage. This study aims to identify which classical physicochemical
parameters (colour, total soluble solids (TSS), pH, acidity, ripening index, firmness, vitamin C,
total phenols, protein, lipids, fibre, ash, other compounds including carbohydrates, and energy) could
be fingerprint markers of PDO “Pera Rocha do Oeste”. For this purpose, a data set constituting fruits
from the same size, harvested from three orchards of the most representative PDO locations and
stored in refrigerated conditions for 2 or 5 months at atmospheric conditions or for 5 months under a
modified atmosphere, were selected. To validate the fingerprint parameters selected with the first set,
an external data set was used with pears from five PDO orchards stored under di erent refrigerated
conditions. Near infrared (NIR) spectroscopy was used as a complementary tool to assess the global
variability of the samples. The lightness of the pulp; the b* CIELab coordinate of the pulp and peel;
and the pulp TSS, pH, firmness, and total phenols, due to their lower variability, are proposed as
fingerprint markers of this pear
Descrição
Palavras-chave
Rocha pear protected designation of origin chemical composition quality near infrared (NIR)
Contexto Educativo
Citação
Foods 2020, 9, 1209
Editora
MDPI