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Cryopreservation of Robinia pseudoacacia explants by vitrification achieved 78% survival following the stepwise preculture of shoot tips in (0.3 + 0.5 + 0.7 M) sucrose with a 80 min incubation in PVS2; compared to 87% survival after desiccation of explants to 30% water content, following 3 days alginate bead (with glycerol and sucrose treatments) preculture in 0.7 M sucrose.Abbreviations: DMSO -dimethylsulfoxide; LN -liquid nitrogen; MS -Murashige and Skoog medium (Murashige and Skoog, 1962)

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