OBJECTIVE
Induction of dehydration tolerance is a key to achieving high survival rates in cryopreservation of plant specimens. It has been reported previously that two-steppreculturing with sucrose effectively increased desiccation tolerance in axillary buds of gentian (Gentiana scabra), which
Cryogenic storage of cell suspensions allows long-term maintenance of cultures. The main purpose of the study was to develop a successful cryogenic protocol for 10-year-old embryogenic cell suspensions of G. tibetica. We examined three techniques of freezing: (I) controlled-rate cooling with various