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Shoot-tips of Rabdosia rubescens, excised from in vitro-grown proliferating shoots that were cold-hardened at 5°C for 3 weeks, were encapsulated in alginate beads. Subsequently, these were precultured in a mixture of 0.4 M sucrose and 2 M glycerol for 1 h and then desiccated with silica-gel to about 21% water content prior to freezing in liquid nitrogen. After thawing, about 85% of cryopreserved shoot-tips...
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