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Selective effects of sulfur dioxide and yeast starter culture addition on indigenous yeast populations and sensory characteristics of wine
Author(s) -
HenickKling,
Edinger,
; Daniel,
Peter N. Monk
Publication year - 1998
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.1998.00423.x
Subject(s) - starter , food science , fermentation , yeast , wine , acetaldehyde , acetic acid , titratable acid , winemaking , yeast in winemaking , acetic acid bacteria , chemistry , saccharomyces , sulfite , inoculation , biology , saccharomyces cerevisiae , ethanol , horticulture , biochemistry
Riesling musts, with or without sulfur dioxide added, were fermented either with or without the addition of yeast. Uninoculated fermentations took much longer to finish than inoculated musts. There were no significant differences in growth of non‐ Saccharomyces yeasts in uninoculated musts with less than 50 mg l −1 SO 2 added. The starter culture was completely dominant over indigenous Saccharomyces cerevisiae and strongly inhibitory to non‐ Saccharomyces . Alcohol and acetaldehyde were greater in the inoculated treatments ; titratable acidity and acetic acid were greater in the uninoculated fermentations. There were no statistically significant differences among any treatments in final pH, ammonia content, or colour (A 420 ). Uninoculated fermentations had higher sensory scores ( P > 0·95) for ‘spicy’, ‘apple’, ‘melon’, ‘pear’, and ‘H 2 S’, while inoculated wines had higher scores ( P > 0·95) for ‘paper’, ‘oxidized’, and ‘sweaty’. Sulfite treatment produced an assortment of significant sensory differences in the finished uninoculated wines, but in inoculated wines the additions of SO 2 to the must had no significant effect on indigenous yeast populations or on flavour.