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投稿时间:2020-03-05
投稿时间:2020-03-05
中文摘要: 以米曲霉(Aspergillus oryzae)3.042为出发菌株,其孢子在无菌水中孵育4 h后,首先经两次紫外照射诱变,筛选获得产曲酸能力提高的突变株UV15。随后将UV15继续进行超声波和微波照射的复合诱变筛选,获得高产菌株M22,将其传代10次后,最终确定M22是一株生长性能和产酸能力均稳定的曲酸高产菌株。该菌株在接种量为104个/mL、30℃、摇床250 r/min、发酵时间6.5 d的条件下,产酸量由原来的11.55 g/L提高到34.28 g/L,比出发菌株提高了197%。
Abstract:In order to increase the yield of kojic acid,the spores of Aspergillus oryzae (A.oryzae)3.042 swelled in steriled water for 4 hours and were mutated twice by UV ultraviolet irradiation,a high-yield strain UV15 was obtained.Then the combined mutagenesis screening of ultrasonic and microwave irradiation was continued for UV15,and a high-yield strain M22 was obtained.After 10 generations screening,M22 was stable in growth performance and kojic acid production capacity.The acid yield of A.oryzae M22 increased from 11.55 g/L to 34.28 g/L,which was 197% higher than that of the original strain at inoculation 104spores/mL,30℃,250 r/min,and fermentation 6.5 days.
keywords: Aspergillus oryzae kojic acid ultraviolet mutagenesis ultrasound-microwave mutagenesis fermentation
文章编号:202102030 中图分类号: 文献标志码:
基金项目:山东省泰山产业领军人才培育计划(2016GRC3201);国家自然科学基金青年科学基金项目(31902193)
作者 | 单位 |
高紫君,毕付提,蒋水星,刘博雅,史亚楠,王德培 | 天津科技大学生物工程学院,天津 300457;山东日照金禾博源生化有限公司,山东 日照 276800;工业发酵微生物教育部重点实验室,天津 300457 |
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