食品科学 ›› 2013, Vol. 34 ›› Issue (7): 231-233.doi: 10.7506/spkx1002-6630-201307048

• 生物工程 • 上一篇    下一篇

产聚半乳糖醛酸酶的黑曲霉诱变育种

张媛媛,郝 林*,王 倩   

  1. 山西农业大学食品科学与工程学院,山西 太谷 030801
  • 收稿日期:2011-12-24 修回日期:2013-02-26 出版日期:2013-04-15 发布日期:2013-03-20
  • 通讯作者: 郝林 E-mail:haolinsxnd@126.com

Mutation Breeding of a High Polygalacturonase-Producing Aspergillus niger Strain

ZHANG Yuan-yuan,HAO Lin*,WANG Qian   

  1. College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
  • Received:2011-12-24 Revised:2013-02-26 Online:2013-04-15 Published:2013-03-20
  • Contact: HAO Lin E-mail:haolinsxnd@126.com

摘要: 利用透明圈法对黑曲霉SH312菌株进行初筛,得到黑曲霉SH312-26菌株。对其进行紫外线诱变,筛选出SH312-26-19菌株,该菌株聚半乳糖醛酸酶酶活力为113.68kU/mL,较出发菌株SH-312-26提高了1.44倍;果胶酯酶酶活力为14.34kU/mL,较出发菌株提高了0.14倍,其幅度远小于聚半乳糖醛酸酶酶活的提高幅度。突变株SH312-26-19经斜面传代培养了5代,产酶遗传特性稳定。

关键词: 聚半乳糖醛酸酶, 诱变育种, 筛选

Abstract: Aspergillus niger strain SH312-26 was isolated by apparent circle method from strain SH312. A mutant strain named as SH312-26-19 was obtained by UV radiation using SH312-26 the original strain. The polygalacturonase activity of SH312-26-19 was 113.68 kU/mL, a 1.44-fold increase than that of strain SH-312-26. The pectin esterase activity was 14.34 kU/mL, a 0.14-fold increase than that of the original strain. After 5 passages on slant culture medium, the mutant remained genetically stable.

Key words: polygalacturonase, mutation breeding, selection

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