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

:使用玻璃化和包囊玻璃化方案,我们成功地冷冻了不同龙胆属植物(系)体外植物的芽尖。尽管两种方案在液氮中保存后均具有较高的存活率,但与玻璃化方案相比,封装玻璃化方案具有几个明显的优势:(i)在最佳条件下的存活率更高;(ii)植物玻璃化的最佳暴露时间范围溶液2(PVS2)的范围更广,并且(iii)低温保存的芽尖的再生显然更旺盛且更快。使用这两种方案成功地冷冻保存了三种龙胆属植物(G. scabra,G。triflora和G. pneumonanthe)的十个品种/品系的芽尖,玻璃化和包封玻璃化的平均存活率分别为49.0%和73.7%。这些结果表明,在本研究中优化的两种方案有望用于冷冻保存多种龙胆的遗传资源。

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