The γ-PGA production from B. licheniformis WX-02 was salt-inducible. The maximum
volumetric yield was attained when the NaCl concentration was 8%, and the γ-PGA
molecular sizes decreased as NaCl concentration increased in the ME medium. These
results indicated that WX-02 was the first halotolerant B. licheniformis for γ-PGA
production, as well as a valuable strain for regulation of the yields and molecular sizes of
γ-PGA by NaCl.