Identification and Oenological Property Analysis of a Strain of Hanseniaspora uvarum Isolated from Wild Rosa roxburghii Tratt
Morphological and molecular biology techniques were used to analyze the specie category and oenological properties of a strain of fruity-aroma producing yeast WR-27 isolated from wild Rosa roxburghii Tratt.Growth characteristics and brewing environment tolerances were detected by spectrophotometry,production of hydrogen sulfide and p-glucosidase were analyzed by chromogenic methods,and aroma production characteristics were analyzed by the electronic nose system.The results showed that WR-27 was identified as a strain of Hanseniaspora uvarum from wild R.roxburghii.The growth performance of WR-27 was lower than that of the commercial Saccharomyces cerevisiae X16 during the logarithmic growth period,and glucose tolerance and sulfur dioxide tolerances and carbon source metabolism characteristics were similar to S.cerevisiae X16.Besides,WR-27 was sensitive to ethanol stress,and could tolerate 3％ethanol treatment.In addition,WR-27 does not produce hydrogen sulfide and has high yield of β-glucosidase and strong metabolic capacity of aroma substances.Therefore,the strain of WR-27 has certain application potential in wine fermentation.
wild Rosa roxburghii TrattHanseniaspora uvarumspecie identificationoenological property
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