R. glutinis DM28, a -carotene-producing yeast isolated from
fermented vegetable brine, was used [15,17]. It was stored at the
microbial culture collection, Department of Microbiology, King
Mongkut’s University of Technology Thonburi, Thailand. The yeast
was maintained on a yeast and malt extract (YM) slant (g l−1: yeast