天津农学院学报 ›› 2019, Vol. 26 ›› Issue (4): 43-48.doi: 10.19640/j.cnki.jtau.2019.04.009

• 研究与简报 • 上一篇    下一篇

三赞胶降解菌的筛选鉴定及降解产物的抗氧化活性分析

程斌1, 李晓雁2, 潘奕臣1, 冯雪1, 黄海东1, 通信作者   

  1. 1. 天津农学院 农学与资源环境学院,天津 300384;
    2. 天津农学院 食品科学与生物工程学院,天津 300384
  • 收稿日期:2019-04-03 发布日期:2020-01-19
  • 通讯作者: 黄海东(1972-),男,教授,博士,研究方向:资源与应用微生物学。E-mail:hdhuang@tjau.edu.cn。
  • 作者简介:程斌(1997-),男,本科在读,研究方向:生物技术。E-mail:153900910@qq.com。
  • 基金资助:
    国家级大学生创新创业训练计划项目(201810061001);天津市大学生创新创业训练计划项目(201910061068);国家自然科学基金(31571790)

Screening, identification of sanxan-degrading microorganisms and antioxidant activities of degradation product

CHENG Bin1, LI Xiao-yan2, PAN Yi-chen1, FENG Xue1, HUANG Hai-dong1, Corresponding Author   

  1. 1. College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin 300384, China;
    2. College of Food Science and Bioengineering, Tianjin Agricultural University, Tianjin 300384, China
  • Received:2019-04-03 Published:2020-01-19

摘要: 筛选得到3株三赞胶降解菌,可在以三赞胶为唯一碳源的培养基平板上产生降解圈,多项分类鉴定结果表明,降解菌JD05和JD08分别为荧光假单胞菌和巨大芽胞杆菌,降解菌SZJ01为烟曲霉。3株降解菌协同作用,37 ℃处理72 h,三赞胶溶液粘度下降79.6%,多糖分子量降低为2个不同分子量分布的组分,重均分子量分别为1.9×104 Da和3.7×103 Da,经生物降解处理后,三赞胶多糖降解产物的抗氧化活性提高,清除羟自由基和超氧阴离子的IC50分别为3.8 mg/mL和2.6 mg/mL。

关键词: 三赞胶, 多糖, 降解菌, 分子量, 抗氧化活性

Abstract: :Sanxan-degrading strains were screened, which formed degrading band on medium plate with sanxan as the only carbon source. On the basis of polyphasic taxonomic study, strain JD05, JD08 and SZJ01 were considered to be Pseudomonas fluorescens, Bacillus megaterium and Aspergillus fumiga. Treated by the mixture fermentation liquid of these three strains with the temperature of 37 ℃ and 72 h, the viscosity of sanxan solution decreased by 79.6%. The molecular weight of polysaccharide was reduced to two components with different molecular weight distributions, with 1.9×104 Da and 3.7×103 Da, respectively. The antioxidant activity of sanxan degradation product increased, with the IC50 of scavenging hydroxyl free radical 3.8 mg/mL and the IC50 of scavenging superoxide anion 2.6 mg/mL, respectively.

Key words: sanxan, polysaccharide, degrading microorganisms, molecular weight, antioxidant activity

中图分类号: