
研究报告
中国酿造
2012年第31卷第7期
总第244期
蛹虫草高产胞外虫草素和虫草多糖的诱变育种
孟泽彬12,文庭池*,康冀川",康超,王永江2
(1.资州师范学院化学与生命科学学院,贵州资阳550018;2.贵州大学西南药用生物资源教育部工程研究中心,
贵州贵阳550025)
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要:通过诱变获得高产胞外虫草素和虫草多糖的虫草菌株,采用紫外线诱变(UV)、化学诱变(LiCD、复合诱变(UV-LiCD3种满
方式对翊虫草孢子进行诱变;发酵检测存活菌株的胞外虫草素和虫草多糖的含量。结果:以胞外虫草素为指标,3种诱变方式的最大正突变率分别为化学突变(29.2%)>紫外突变(28.6%)>复合诱变(26.5%);以胞外多糖为指标,最大正突变率分别为紫外诱变(35.7%)>复合诱变(33.3%)>化学诱变(27.0%),紫外诱变突变株Z-5-1胞外虫草素产量达0.842g/L,比出发菌株高311%;紫外诱变突变株Z-4-7胞外虫草多糖产量达5.250g/L,比出发菌株高148%,在连续培养5代后,仍具有较好的遗传稳定性。紫外诱变能获得较高的蛹虫草正突变率,同时能获得高产虫草素、虫草多糖的突变株。
关键调:翊虫草:胞外;虫草素;虫草多糖:诱变中图分类号:Q93-331
文献标识码:A
文章编号:02545071(2012)07-005705
Enhanced production of extracellular cordycepin and polysaccharide in Cordyceps militaris by mutation breeding
MENG Zebin', WEN Tingchi*, KANG Jichuan', KANG Chao, WANG Yongjiang
(I. School of Chemistry and Life Science, Guizhou Noma/ College, Guiyang, 550018 China; 2. The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang 550025, China) Abstract: The aim was to obtain high-yield strains of extracellular cordycepin and polysaccharide of Cordyceps militaris. Three kind of mutation way, ultraviolet radiation (UV).lithium chloride (LiCI) and compound mutagenesis (UV-LiCI) were used to deal with the spores of Cordyceps mili-taris. Fermenting the survival strains and detecting their content of extracellular cordycepin and cordyceps polysaccharide, The results showed: the maximum positive mutation rate order of extracellular cordycepin was LiCI( 29.2%)>UV(28.6%)>UV-LiC1(26.5%) respectively, and that of extra-cellular polysaccharide was UV(35.7%)> UV-LiCI (33.3%)>LiC(27.0%), The UV-induced mutant strain Z-5-1 bad the highest extracelular cordy-cepin yield of0.842g/L, which was 311% higher than that of the original strain. And the UV-induced mutant strain Z-4-7 had the highest extracellular Cordyceps polysaccharide production of 5.250og/L, which was 148% higher than that of the original strain. UV mutagenesis could obtain a higher pos-itive mutation rate for Cordyceps mifitaris, while could produce good mutant strains with high-yield of extracellular cordycepin and extracellular paoeods
Key words: Cordyceps militaris; extracellular; cordycepin: polysaccharide; mutagenesis
蛹虫草(CordcepsmilitarisL.Link)又名北冬虫夏草、北
虫草,主要分布在我国山西、陕西、吉林、河北等省区,是极具
收稿日期:2012-05-22
基金项目:贵州省教育厅自科学研究项目(黔教科(2009)0129号):贵州省"十二五"农业科技攻关项目(黔科合NY字2011)3054号):贵州
大学自然科学青年科研基金(NO:(2007)076)
作者篇介:孟泽彬1977-),男,讲师,主要从事真菌及天然产物化学研究工作;文庭池*,助理研究员,通讯作者。
乙酸钠0.51mg/mL,在此条件下,对所建立的数学模型进行了试验验证,得到光密度值为0.273,与理论值0.273858
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