Abstract:
To obtain the non-
Saccharomyces cerevisiae suitable for the
Rosa roxburghii wine fermentation,
non-Saccharomyces cerevisiae isolated from spontaneous fermented
Rosa roxburghii wine were identified by the analysis of morphology and 26S rDNA sequence. Physiological characteristics were detected via analyzing of glucose tolerance,citric acid tolerance,alcohol tolerance,sulfur dioxide tolerance,tannic tolerance,
β-glycosidase producing ability and sulfuretted hydrogen producing ability. To explore the effects of non-
Saccharomyces cerevisiae on the quality of
Rosa roxburghii wine,the conventional physicochemical indexes,sensory evaluation and aroma profiles of
Rosa roxburghii wine fermented with non-
Saccharomyces cerevisiae and
Saccharomyces cerevisiae were performed. A total of 80 strains of non-
Saccharomyces cerevisiae were isolated and identified from
Rosa roxburghii using lysine identification medium. One aroma-producing strain named F13 was chosen for the further study via sniffing method. Morphological and molecular biology results indicated that F13 was
Hanseniaspora uvarum from
Rosa roxburghii. The F13 strain was able to tolerate 300 g/L glucose,3% ethanol,3% citric acid,300 mg/L SO
2 and 25 g/L tannin. However,the alcohol tolerance and
β-glycosidase producing ability were lower than
Saccharomyces cerevisiae X16. In addition,F13 did not produce sulfuretted hydrogen. Moreover,the mixed fermentation of F13 with
Saccharomyces cerevisiae could reduce the alcohol content and volatile acid of
Rosa roxburghii wine,and the concentration were 11.1%±0.39%,(0.67±0.03) g/L and (20.41±1.44 g/L),respectively. Besides,the mixed fermentation of F13 with
Saccharomyces cerevisiae could not affect the sensory evaluation of
Rosa roxburghii wine. But it could effectively increase the variety and contents of alcohols,and reduce the variety and contents of esters of
Rosa roxburghii wine. In this study,one
non-Saccharomyces cerevisiae strain F13 was obtained from spontaneous fermented
Rosa roxburghii wine,which possessed excellent tolerance to brewing environment,including sugar,acid,alcohol and sulfur dioxide,therefore had some industrialized application potential.