›› 2012, Vol. 24 ›› Issue (2): 0-283.

• 环境科学 •    

纤维素降解菌协同效应与粗酶液影响因素

王志刚1,2,徐伟慧1,*,厉悦3,钟鹏4,王建丽5,莫继先1

  

  1. 1齐齐哈尔大学 生命科学与农林学院, 黑龙江 齐齐哈尔 161006;2东北农业大学 资源与环境学院,黑龙江 哈尔滨 150030;3齐齐哈尔大学 化学与化学工程学院, 黑龙江 齐齐哈尔 161006;4黑龙江省农业科学院 大豆研究所,黑龙江 哈尔滨 150086;5黑龙江省农业科学院 草业研究所,黑龙江 哈尔滨 150086
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-03-25 发布日期:2012-03-25

Synergism of cellulosedecomposing microorganisms and influence factors of crude enzyme liquid

WANG Zhi-gang;XU Wei-hui;LI Yue;ZHONG Peng;WANG Jian-li;MO Ji-xian   

  1. 1College of Life Science and Agriculture and Forestry, Qiqihar university, Qiqihar 161006, China;2Resources and Environment Institute, Northeast Agricultural University, Harbin 150030, China; 3College of Chemistry and Chemical Engineering Qiqihar university, Qiqihar 161006, China; 4Soybean Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China; 5Institute of Pratacultural Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-03-25 Published:2012-03-25

摘要:

高效微生物菌系和适宜反应条件是纤维素生物转化的关键。试验以前期分离获得的纤维素降解菌为基础,研究了降解菌之间的协同效应和粗酶液性质。结果表明,降解菌之间存在协同效应,其中X2与X5混合培养产酶能力达到了0.66 U·mL-1,比单一降解菌酶活力提高了将近1倍;其粗酶液最适反应温度和pH值为25 ℃和5.0;金属离子络合剂EDTA对酶活力的抑制效果较为明显;Ca2+和Mn2+是粗酶液的激活剂,在研究浓度范围内能够显著提升酶活力。研究结果为纤维素的生物转化提供了重要种质资源和技术参数。

关键词: 纤维素降解菌, 协同效应, 金属离子

Abstract: Efficient microbial strains and appropriate reaction conditions are the keys to the biotransformation of cellulose. Based on cellulosedecomposing microorganisms isolated, we studied synergism of cellulosedecomposing microorganisms and properties of crude enzyme liquid. Results showed that synergism was significant between the degrading bacterium, enzyme activity that X2 and X5 mixed culture produced was up to 066 U·mL-1, which increased nearly 1 times than that of singledegrading bacteria. The optimum temperature and pH of crude enzyme were 25℃ and 50 respectively. The inhibitory effect of EDTA on the enzyme activity was more obvious. Ca2+ and Mn2+ were activators of the crude enzyme solution, which could significantly enhance the enzyme activity in the concentration range of the study. The results provided important germplasm resources and technical parameters for the bioconversion of cellulose.

Key words: cellulosedecomposing microorganisms, synergism, metal ions