BREEDING METHOD OF ACETIC ACID BACTERIUM IMPROVED PRODUCTION ABILITY OF ACETIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a breeding method of an acetic acid bacterium improved production ability of acetic acid which has growth ability and fermentation ability of acetic acid at high temperature.SOLUTION: A breeding method of an acetic acid bacterium comprises the steps of: acquiring gene involved in resistance ability of acetic acid, heat resistance and peroxidation of acetic acid in an acetic acid bacterium; modifying protein coded in the gene to reduce or delete a function of the protein, thereby improving production ability of acetic acid in an acetic acid bacterium; and breeding the acetic acid bacterium. Vinegar with high concentration of acetic acid is effectively produced by cultivating the acetic acid bacterium improved the production ability of acetic acid in a culture medium containing ethanol.