三角褐指藻紫外线诱变及高产EPA藻株选育  

UV irradiation to Phaeodactylum tricornutum and screening of EPA strains

作　　者：刘红全 潘艺华 林小园 李洁琼 袁莎 卢恩秋 LIU Hong-quan;PAN Yi-hua;LIN Xiao-yuan;LI Jie-qiong;YUAN Sha;LU En-qiu(College of Marine Science and Biotechnology,Guangxi University for Nationlities,Guangxi Key Laboratory Cultivation Base for Polysaccharide Materials and their Modification,Key Laboratory of Utilization of Microbial and Botanical Resources,Nanning 530006,China)

机构地区：[1]广西民族大学海洋与生物技术学院,化学与生物转化过程新技术广西高校重点实验室,广西南宁530006

出　　处：《海洋科学》2017年第9期87-93,共7页Marine Sciences

基　　金：国家自然科学基金项目(30960215);广西自然科学基金项目(桂科青0728019)~~

摘　　要：利用紫外诱变法对三角褐指藻(Phaeodactylum tricornutum)进行诱变育种。实验得到三角褐指藻的最佳紫外辐射剂量为18 W的紫外灯距离藻液35 cm照射15 min。通过单细胞分离技术获得1株突变株UP1,与出发藻株相比,突变株UP1的EPA产量提高10.2%。研究了诱变株的最适生长及产EPA的条件,结果表明UP1在NaNO_3 75 mg/L,p H 7.5,昼夜温度17~15℃,接种量为10%时培养7天,具有最大的生长速率和EPA产量。探讨了诱变株的遗传稳定性,结果表明诱变株可稳定遗传。This study investigated the mutagenesis of Phaeodactylum tricornutum induced by UV irradiation and its capacity of EPA accumulation influenced by various cultivation factors.The appropriate ultraviolet irradiation dose that can be applied to P.tricornutum was found to be below 35 cm for 15 min.A special clone UP1 was isolated from more than 200 mutant clones.Compared with the wild species,the EPA content of mutant UP1 was increased by about 10.2%.The effects of NaNO3 concentration,pH of the medium,and temperature on EPA production were investigated,which showed that the optimal cultivation conditions were NaNO3 75 mg/L,pH 7.5,natural day/night temperature about 17–15℃,and 10%of inoculation density for 7 days of cultivation.The mutant species demonstrated inherited stable.

关 键 词：三角褐指藻(Phaeodactylum tricornutum) 紫外诱变 EPA 培养条件 遗传稳定性 

分 类 号：Q949.2[生物学—植物学]