| Title | Diversity and physiological properties of soil actinobacteria in Ulleung Island | ||
| Author | Bo-Ram Yun, Su Gwon Roh, and Seung Bum Kim* | ||
| Address | Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, Daejeon 34134, Republic of Korea | ||
| Bibliography | Korean Journal of Microbiology, 53(4),242-250, 2017 | ||
| DOI | https://doi.org/10.7845/kjm.2017.7057 | ||
| Key Words | Streptomyces, actinobacteria, antimicrobial activity, plant growth promoting potential, Ulleung Island | ||
| Abstract | Actinobacteria tolerating extreme conditions can be a rich source of bioactive compounds and enzymes. In this study filamentous actinobacteria were isolated from soils of Ulleung Island, and their physiological properties were examined. Soil samples were collected, serially diluted and spread on various agar media. The average viable counts of total bacteria were 1.28 × 10 7 CFU/g for soil sample 1 (ULS1) and 2.05 × 10 7 CFU/g for soil sample 2 (ULS2). As a result, 34 strains of actinobacteria were isolated and assigned to the genera Streptomyces (16 strains), Isoptericola (5 strains), Rhodococcus (4 strains), Agromyces (3 strains), Micrococcus (2 strains), Arthrobacter (1 strain), Williamsia (1 strain), Microbacterium (1 strain), and Oerskovia (1 strain) based on 16S rRNA gene sequence analysis. Enzyme activity and plant growth promoting potential were tested for representative isolates. Multiple strains of Streptomyces degraded starch, casein and Tween 80. As for plant growth promoting potential, strains of Oerskovia, Williamsia, Isoptericola, and Streptomyces solubilized phosphate, and those of Agromyces, Oerskovia, Micrococcus, Rhodococcus, Streptomyces, and Isoptericola produced 3-indole-acetic acid (IAA), respectively. Selected strains of Streptomyces exhibited strong antagonistic activity against Staphylococcus aureus and Bacillus subtilis as well as Candida albicans. This study confirms that actinobacteria from Ulleung Island can be a good source of novel bioactive compounds. | ||
| Download PDF | 02_[242-250]17-057.pdf | ||