title: Selection of yeasts as starter cultures for table olives.
abstract: Ninety-nine yeasts were isolated from Bella di Cerignola table olives; first, the strains were studied in relation to their ability to produce biogenic amines in a laboratory medium and 49 strains were positive to this assay and cut off from the research. The remaining 50 strains were characterized for their enzymatic traits (β-glucosidase, catalase, pectolytic, xylanolytic, and lipolytic activities) and for their ability to grow at different temperatures, pHs, with salt or lactic/acetic acids added. Data were used for the evaluation of growth index and submitted to cluster and principal component analyses to choose the most promising 4 strains. In the final step of the research, the strains were inoculated as a cocktail in a model brine, containing different amounts of salt (4% to 12%) and glucose (0% to 3%), and adjusted to different pHs (4.0 to 9.0). Data analysis through a multiple regression procedure highlighted that salt, glucose, and pH acted in a different way within the storage and NaCl affected yeast growth only for few days, and then glucose and pH played a major role.
authors.affiliation: Dept. of Agricultural, Food and Environmental Science, Univ. of Foggia, Via Napoli 25, 71122, Foggia, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Bevilacqua
authors.forename: Luciano
authors.initials: L
authors.lastname: Beneduce
authors.forename: Milena
authors.initials: M
authors.lastname: Sinigaglia
authors.forename: Maria Rosaria
authors.initials: MR
authors.lastname: Corbo
mesh_terms: D001679:Biogenic Amines / Q000032:analysis*; D015169:Colony Count, Microbial; D005285:Fermentation; D005516:Food Microbiology; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007558:Italy; D015999:Multivariate Analysis; D031658:Olea / Q000382:microbiology*; D012150:Polymorphism, Restriction Fragment Length; D015203:Reproducibility of Results; D012492:Salts / Q000032:analysis; D013696:Temperature; D015003:Yeasts / Q000145:classification / Q000201:enzymology / Q000254:growth & development / Q000302:isolation & purification*
chemical_list: D001679:Biogenic Amines; D012492:Salts; C017082:brine