食品科学 ›› 2008, Vol. 29 ›› Issue (2): 275-279.

• 生物工程 • 上一篇    下一篇

高产花生四烯酸菌的原生质体诱变育种研究

 赵沫, 戴传超, 王安琪, 陶杰, 勇应辉   

  1. 南京师范大学生命科学学院 江苏省生物多样性与生物技术重点实验室; 南京师范大学生命科学学院; 江苏省生物多样性与生物技术重点实验室; 江苏南京210046;
  • 出版日期:2008-02-15 发布日期:2011-08-24

Study on Protoplast Mutagenagsis of Strains Contain High Contest of Arachidonic Acid

 ZHAO  Mo, DAI  Chuan-Chao, WANG  An-Qi, TAO  Jie, YONG  Ying-Hui   

  1. Jiangsu Key Laboratory of Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China
  • Online:2008-02-15 Published:2011-08-24

摘要: 以轮梗霉紫外诱变突变株A1.13为出发菌株,制备其原生质体并连续采用紫外线、微波及硫酸二乙酯作为诱变剂进行多轮诱变,通过15℃低温和0.12g/ml乙酰水杨酸初筛及摇瓶发酵复筛,得到花生四烯酸稳定提高的突变株MW40+DES20II-4,其花生四烯酸占总脂肪酸的含量从出发株的8.034%提高到15.098%。采用5L全自动发酵罐发酵,其生物量、油脂产量和花生四烯酸产量分别达到12.252、4.307g/L和604.557mg/L,分别比对照提高了24.96%、56.39%和193.924%。通过突变株的脂肪酸组分分析,认为多轮诱变对于脂肪酸生产菌是有效的育种手段。

关键词: 花生四烯酸, 轮梗霉, 原生质体, 诱变育种

Abstract:  Using Diasporangium sp. A1.13 as original strain, the protoplast mutagenesis by UV, microwave and DES were carried on in order to enhance the arachidonic acid yield. The mutant MW40+DES20 II-4 was selected through low temperature (15 ℃) and aspirin (0.12 kg/ml) as inhibitors with the result of the AA content in total fatty acids increasing from 8.034% to 15.098%. Fermentation experiment was carried on 5 L fermentation equipment. Results showed that the biomass, arachidonic acid yield and fatty acid yield reaches 12.252 g/L, 4.307 g/L and 604.557 mg/L respectively increasing 24.96%, 56.39% and 193.924% than the initial strain. It is thought that it is an effective breeding means for fungus producing fatty acids through analysis the fatty acid component of the mutants.

Key words: arachidonic acid, Diasporangium sp., protoplast, mutation breeding