Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Production of Cellulolytic Enzymes by Aspergillus niger on Solid and Submerged State Fermentation

액체와 고체 발효 조건에서 Aspergillus niger의 셀루로오스계 효소 생산

  • Chandra, M. Subhosh (Department of Microbiology, Sri Krishnadevaraya University, Department of Biotechnology, Microbial Molecular Genetics lab, College of Natural Resources and Life Science, Dong-a University) ;
  • Reddy, B. Rajasekhar (Department of Microbiology, Sri Krishnadevaraya University) ;
  • Choi, Yong-Lark (Department of Biotechnology, Microbial Molecular Genetics lab, College of Natural Resources and Life Science, Dong-a University)
  • Published : 2008.08.30
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Abstract

Microbial production of cellulolytic enzymes by Aspergillus niger in solid state fermentation (SSF) and submerged state fermentation (SF) in laboratory scale was compared. Czapek Dox liquid broth amended with cellulose (0.5%) was used for cultivation in SF, whereas rice bran was used as a solid support, moistened with cellulose, amended Czapek Dox broth for growth in SSF. The production of Carboxymethyl cellulase, Filter paperase and ${\beta}$-Glucosidase was monitored at regular intervals. The peak production of the enzymes occurred within 3 days of incubation in SSF as against $\geq$ 7 days in SF. SSF gave higher yields of enzymes in comparison to SF. Maximum titres of 0.40, 0.62 and 0.013 U/ml in respect of FPase, CMCase and ${\beta}$-glucosidase in SSF were recovered as against 0.13, 0.06 and 0.0013 U/ml in SF respectively, at their respective peak time intervals. Hence, SSF appeared to be a better choice for production of cellulolytic enzymes by Aspergillus niger.

Aspergillus niger가 액체발효(SF) 와 고체발효의 시험 규모 조건에서의 셀루로오스계 효소의 생산을 비교하였다. 액체배지는 0.5% 셀루로오스가 함유된 Czapek Dox를 사용하였고, 고체 지지체로 사용한 쌀겨는 셀루로오스로 적시고 SSF 발효를 위하여 Czapek Dox 배지를 첨가하였다. CMCase, 여지 paperase 그리고 ${\beta}$-Glucosidase 의 생산을 경시적으로 측정하였다. SSF 배양에서의 3일간의 효소 생산량은 SF 에서의 7일간 배양과 같았다. 따라서 SSF 조건이 SF 배양 조건보다 많은 효소를 생산함을 알 수 있었다. SSF 조건에서 FPase, CMCase 및 ${\beta}$-glucosidase의 최대 활성은 0.40, 0.62 및 0.013 U/ml 였으나, SF 조건에서는 0.13, 0.06 및 0.0013 U/ml의 활성을 나타내었다. 결론적으로 Aspergillus niger에 의해 생산되는 셀루로오스계 효소의 생산을 위해서는 SSF 발효 조건의 선택이 유리하다는 것을 알 수 있었다.

Keywords

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