Abstract:

Dunaliella salina (Dunal) Teod. and Platymonas helgolandica Kylin var. tsingtaoensis were cryopreserved in liquid nitrogen with a two-step cryopreservation method. With 5% and 20% dimethylsulphoxyde (DMSO) concentration respectively through 30 min equilibrium time, and under -40℃, 60 min and -30℃, 30 min respectively as prefreezing temperature and sustained time, and by using slow dilution method to remove DMSO from the sample at 0℃ and room temperature respectively after sample thawing, D. salina and P. helgolandica var. tsingtaoensis gained the highest survival rates that were 68.5% and 78.3% respectively.

盐生杜氏藻和青岛大扁藻的超低温保存
王起华 张恩栋 李大鹏 程爱华
（辽宁师范大学生物系，大连116029）

摘要：采用两步法冷冻技术超低温保存盐生杜氏藻 (Dunaliellasalina (Dunal)Teod .)和青岛大扁藻 (Platymonashel golandica Kylinvar.tsingtaoensis)。当二甲基亚砜 (DMSO)浓度分别为 5 %和 2 0 % ,平衡时间均为 30min ;预冻温度及保持时间分别为 - 40℃ ,6 0min和 - 30℃ ,30min ;化冻后分别在 0℃和室温下采用慢速稀释法去除DMSO时 ,盐生杜氏藻和青岛大扁藻都达到了最高存活率 ,分别为 6 8 5 %和 78 3%。

关键词： 盐生杜氏藻；青岛大扁藻；超低温保存（液氮）

Key words: Dunaliella salina , Platymonas helgolandica, cryopreservation (liquid nitrogen)