Microbial diversity, morpho-textural characterization, and volatilome profile of the Portuguese thistle-curdled cheese Queijo da Beira Baixa PDO
Articolo
Data di Pubblicazione:
2022
Abstract:
The aim of the present study was to characterize the bacterial and fungal communities naturally occurring in
Queijo da Beira Baixa PDO cheese samples produced in Castelo Branco district (Beira Baixa Region, Portugal)
through viable counts and metataxonomic analyses. Physico-chemical and morpho-textural analyses were also
carried out, together with the analysis of volatile organic compounds (VOCs). In the analyzed samples, pH values
ranged between 4.72 ± 0.15 and 5.85 ± 0.02, with values of lactic acid content comprised between 0.64 ± 0.00
and 1.95 ± 0.16 g 100 g 1. Specific volume of cheese ranged from 1.09 ± 0.08 to 1.32 ± 0.02 g mL 1. Texture
profile analysis showed hardness ranging between 38.3 ± 9.6 N and 68.55 ± 7.5 N. As for lactic acid bacteria,
presumptive lactococci, thermophilic cocci, and lactobacilli counts up to 9 Log cfu g 1. Coagulase-negative cocci
showed counts up to 7 Log cfu g 1. Enterococci counts were up to 6 Log cfu g 1. Finally, counts of eumycetes
showed values up to 4 Log cfu g 1. The results of metataxonomic analysis of bacteria showed the dominance of
Lactococcus lactis in all the samples. Moreover, other taxa were detected, including Lactiplantibacillus plantarum,
Loigolactobacillus coryniformis, Lactococcus piscium, Streptococcus thermophilus, and Lacticaseibacillus zeae. Mycobiota
was characterized by the presence of Candida sake, Ustilago, Cladosporium variabile, Starmerella, Debaryomyces
hansenii, and Pichia kluyveri. In the analyzed Queijo da Beira Baixa PDO cheese samples, carboxylic acids
represented the most detected VOCs, followed by esters, carbonyl compounds, and alcohols.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Cardinali, Federica; Foligni, Roberta; Ferrocino, Ilario; Harasym, Joanna; Orkusz, Agnieszka; Franciosa, Irene; Milanović, Vesna; Garofalo, Cristiana; Mannozzi, Cinzia; Mozzon, Massimo; Cocolin, Luca; Osimani, Andrea; Aquilanti, Lucia
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