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We tested desiccation and/or vitrification procedures to cryopreserve the adventitious roots of Panax ginseng, the source of commercially produced ginsenosides. When only desiccation was applied, the post-freeze survival of 3- to 4-mm root tips was <14% regardless of the composition of the preculture medium or the explant origin. Callus formation was frequently observed after cryopreservation....
The effects of endogenous levels of ethylene and phenolic compounds on somatic embryogenesis, medium-browning, and peroxidase activity were evaluated in thin section cultures ofDoritaenopsis. Cultures were maintained for 8 weeks with four different treatments: i) thick leaf segment culture, ii) thin leaf section culture, iii) thin leaf section culture with ventilation, or iv) thin leaf section culture...
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