二氧化硫對蘋果酸乳酸菌蘋果酸分解能力之抑制作用

Abstract

The effect of sulfur dioxide and pH on the L-malate degradation by malolactic bacteriawas examined. Malolactic bacteria, including Leuconostoc oenos PSU-1, CSb5, and a homolactic strain BB were grown in CBB medium at two pHs (pH 3.4 and 5.5). The

本研究探討二氧化硫及pH值對蘋果酸乳酸菌分解L-蘋果酸之影響。所採 用之蘋果酸乳酸菌包括Leuconostoc oenos PSU-1.CSb5及一株同型乳酸醱酵菌BB菌 株。菌體濃度及對L-蘋果酸分解能力之線性關係依菌株而異。L. oenos CSb5對二 氧化硫最為敏感;然而其貝有最高之L-蘋酸分解能力。L-蘋果酸分解之最佳pH值 因菌株而異;對L. oenos PSU-1,CSb5及同型乳酸醱酵菌BB而言，其最佳L-蘋果酸分 解之pH值分別為4.0-5.0，4.5及4.0。雖然L-蘋果酸無