Isolation of Streptomyces sp. strain 1154 capable of degrading alkali lignin
- Isolation of Streptomyces sp. strain 1154 capable of degrading alkali lignin
- 공경택; 우한민; 박태현; 엄영순
- microbial lignin degradation; alkali lignin; Streptomyces
- Issue Date
- 한국생물공학회 창립 30주년 기념
학술발표대회 및 국제심포지엄
- Lignin is one of the main components of lignocellulose and is the most plentiful natural aromatic hetero-biopolymer. However, due to the recalcitrant characteristics of lignin, microbial degradation of lignin is difficult and complex. In this study, we report a lignin-degrading bacterial strain isolated form wood decaying soil. In order to screen lignin-degrading bacterial strains, we selected candidate isolates based on the bacterial growth in lignin-added agar plates. Among the twenty candidate bacterial isolates, the strain, designated Streptomyces sp. strain 1154 exhibited the gradual decrease of lignin contents in liquid lignin-YPG (yeast extract, peptone and glucose) medium. The degradation of lignin was evaluated by monitoring the decrease of absorbance at 280 nm, and the maximum degradation and decolorization rate of lignin was 66% and 81% respectively in five days at the modified ISP (International Streptomyces Project) medium 4.
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