Ciders were brewed through natural fermentation or yeast inoculated fermentation with six grape varieties, ‘Red Fuji', ‘Qing Xiangjiao', ‘Xiao Guoguang', ‘Pink Lady', ‘Granny Smith', ‘Hong Jiangjun' as raw materials.The effects of apple varieties on methanol production in cider and the correlation between pectin, pectinase activity and methanol content in cider were investigated in terms of physicochemical indexes, pectins and pectinase activities in apple juice and cider.The results showed that among the six apple varieties tested, the highest total pectin content was found in ‘Qing Xiangjiao', ‘Hong Jiangjun' and ‘Granny Smith', all of which exceeded 6 μmol/g.The naturally occurring pectinase activities in ‘Hong Jiangjun', ‘Qing Xiangjiao' and ‘Xiao Guoguang' were relatively high, all of which exceeded 80 U/g, and the pectinesterase activity in ‘Hong Jiangjun' was the highest at 1.78 U/g, followed by ‘Qing Xiangjiao' at 1.50 U/g.For inoculated fermentation treatments, the methanol content was lowest in ‘Red Fuji' cider at 0.17 g/L and highest in ‘Qing Xiangjiao' cider at 0.29 g/L.For the natural fermentation treatments, the methanol content was highest in ‘Xiao Guoguang' cider at 0.61 g/L, and lowest in ‘Pink Lady' and ‘Granny Smith' at 0.42 g/L and 0.41 g/L, respectively. The methanol content in naturally fermented cider was significantly higher than that in inoculated fermentation treatment, which may be related to the fact that the microbial-derived pectinesterase activity was always significantly higher in the natural fermentation than in the inoculated fermentation treatment.This study provides data reference for the selection of apple varieties suitable for cider brewing and the safe production of cider products.
DING Yan
,
TANG Xiaohong
,
LIN Xueqing
,
LI Zhiyu
,
ZHONG Ke
,
HAO Qian
,
WANG Xiaojun
,
SUN Yuxia
. Influence of pectins and pectinase activities in apple and fermentation modes on the methanol content in cider[J]. Food and Fermentation Industries, 2024
, 50(19)
: 142
-147
.
DOI: 10.13995/j.cnki.11-1802/ts.037419
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