Using vitrification and encapsulation-vitrification protocols, we successfully cryopreserved shoot apices from in-vitro plants of different Gentiana cultivars (lines). Although both protocols gave high survival percentages after storage in liquid nitrogen, the encapsulation-vitrification protocol had several distinct advantages over the vitrification protocol: (i) survival was higher under optimal conditions, (ii) the range of optimal exposure periods to the plant vitrification solution 2 (PVS2) was broader, and (iii) regrowth of cryopreserved shoot apices was apparently more vigorous and faster. Shoot apices from ten cultivars/lines of three Gentiana species (G. scabra, G. triflora, and G. pneumonanthe) were successfully cryopreserved using the two protocols with average survival of 49.0 percent and 73.7 percent for vitrification and encapsulation-vitrification, respectively. These results indicate that the two protocols optimized in the present study are promising for cryopreservation of a wide range of Gentiana genetic resources.

译文

使用玻璃化和封装玻璃化方案,我们成功地从不同龙胆品种 (系) 的体外植物中冷冻保存了茎尖。尽管两种方案在液氮中储存后均具有较高的存活率,但封装-玻璃化方案与玻璃化方案相比具有几个明显的优势 :( i) 在最佳条件下的存活率更高,(ii) 植物玻璃化溶液2 (PVS2) 的最佳暴露时间范围更广,(iii) 冷冻保存的芽尖的再生速度显然更加旺盛和更快。使用这两种方案成功地冷冻保存了三种龙胆物种 (G. scabra,G. triflora和G. pneumonanthe) 的十个品种/品系的茎尖,平均存活49.0% 和73.7% 分别用于玻璃化和包封玻璃化。这些结果表明,在本研究中优化的两个方案有望用于广泛的龙胆遗传资源的冷冻保存。

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