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Cryopreservation of in vitro-grown apical meristems of Lilium by droplet-vitrification

文献类型： 外文期刊

作者： Chen, X. -L. 1 ; Li, J. -H. 1 ; Xin, X. 1 ; Zhang, Z. -E. 1 ; Xin, P. -P. 1 ; Lu, X. -X. 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

关键词： Apical meristem;Cryopreservation;Droplet-vitrification method;Lily (Lilium L);Orthogonal experimental design

期刊名称：SOUTH AFRICAN JOURNAL OF BOTANY （ 影响因子：2.315； 五年影响因子：2.71 ）

ISSN： 0254-6299

年卷期： 2011 年 77 卷 2 期

页码：

收录情况： SCI

摘要： In this study, apical meristems from adventitious buds of three lily (Lillium L.) cultivars were successfully cryopreserved by droplet-vitrification. The most effective techniques were as follows. Excised meristems from in vitro plantlets which had been sub-cultured for about 2 months were cold-hardened at 4 degrees C for I week, precultured on MS medium supplemented with 0.3 mol L(-1) sucrose for 2 days, osmoprotected in loading solution for 20-40 min at room temperature and then soaked in PVS2 solution for 90-120 min at 0 degrees C, frozen in microdroplets of vitrification solution placed on aluminium foils, which were immersed rapidly in liquid nitrogen. The meristems were then rapidly rewarmed by dilution solution, transferred to regeneration medium and stored in the dark for two weeks at 20 degrees C, and then cultured under white fluorescent light at an intensity of 2000 lux, with a 16 h photoperiod at 20 degrees C. The highest post-thaw survival percentages of three cultivars 'Siberia' (Lilium x siberia), Lilium lancifolium Thunb. and 'Snow Queen' Lilium x longiflorum were 65.0%, 83.8% and 43.3%, and regeneration percentages were 62.0%, 67.6% and 35.0%, respectively. The study demonstrated that cryopreservation by droplet-vitrification increased survival and regeneration percentages of certain lily cultivars compared with vitrification. Thus to cryopreserve lily meristems, droplet-vitrification method is preferable to the vitrification method. Crown Copyright (C) 2010 Published by Elsevier B.V. on behalf of SAAB. All rights reserved.

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