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Diversity of Cold-Active Protease-Producing Bacteria from Arctic Terrestrial and Marine Environments Revealed by Enrichment Culture
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  • Diversity of Cold-Active Protease-Producing Bacteria from Arctic Terrestrial and Marine Environments Revealed by Enrichment Culture
  • Diversity of Cold-Active Protease-Producing Bacteria from Arctic Terrestrial and Marine Environments Revealed by Enrichment Culture
저자명
Kim. Eun-Hye,Cho. Kyeung-Hee,Lee. Yung-Mi,Yim. Joung-Han,Lee. Hong-Kum,Cho. Jang-Cheon,Hong. Soon-Gyu
간행물명
The journal of microbiology
권/호정보
2010년|48권 4호|pp.426-432 (7 pages)
발행정보
한국미생물학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

A new approach for enrichment culture was applied to obtain cold-active protease-producing bacteria for marine and terrestrial samples from Svalbard, Norway. The method was developed for the enrichment of bacteria by long-term incubation at low temperatures in semi-solid agar medium containing meat pieces as the main source of carbon and energy. ZoBell and 0.1${ imes}$ nutrient broth were added for marine and terrestrial microorganisms, respectively, to supply basal elements for growth. One to three types of colonies were observed from each enrichment culture, indicating that specific bacterial species were enriched during the experimental conditions. Among 89 bacterial isolates, protease activity was observed from 48 isolates in the screening media containing skim milk. Good growth was observed at $4^{circ}C$ and $10^{circ}C$ while none of the isolates could grow at $37^{circ}C$. At low temperatures, enzyme activity was equal to or higher than activity at higher temperatures. Bacterial isolates were included in the genera Pseudoalteromonas (33 isolates), Arthrobacter (24 isolates), Pseudomonas (16 isolates), Psychrobacter (6 isolates), Sphingobacterium (6 isolates), Flavobacterium (2 isolates), Sporosarcina (1 isolate), and Stenotrophomonas (1 isolate). Protease activity was observed from Pseudoalteromonas (33 isolates), Pseudomonas (10 isolates), Arthrobacter (4 isolates), and Flavobacterium (1 isolate).