• 한국미생물·생명공학회지
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• 제28권4호
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• pp.239-241
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• 2000

From 5 forest soil samples, the isolation frequency of oligotrophic Actinomycetes was investigated with nutrient and minimal media. The frequency of soil Actinomycetes by the minimal media. The frequency of soil Actinomycetes by the minimal media of DHV, WA, BA and NA was similar to the value by HV nutrient medium. In addition, different Actinomycetes were isolated from all the media used in this experiment and then their growth were tested on nutrient (Bennett's agar) and minimal media(WA). In consequent, the number of different Actinomycetes from minimal media was 26.1 strains, whereas the number of from nutrient medium (HV) was 26.6 strains. Furthermore, the percentage of facultative and obligate strains among the oligotrophic Actinomycetes was 90% and 10%, respectively.

• 한국미생물·생명공학회지
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• 제22권5호
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• pp.561-563
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• 1994

For the more effective isolation of soil actinomycetes, we have developed HHV (Hair hydrolysate-vitamin) agar medium, containing hair as the sole source of carbon and nitrogen. The HHV agar medium was superior to other media such as colloidal chintin agar, glycerol-arginine agar and starch-casein-nitrate agar, and HV (humic acid-vitamin) agar. The maximum effect of this medium has been shown in hair dry weight 0.4 g/l medium. Of each soil sample, the greatestest number of actinomycetes was isolated from the potato annual planted soil among the tested samp- les. The genus of actinomycetes isolated from the potato annual planted soil sample was identified such 5 group as Stretomyces, Micromonospora, Microbispora, Nocardia and Saccharopolyspora.

• 한국미생물·생명공학회지
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• 제28권3호
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• pp.129-133
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• 2000

Different actinomycete strains were isolated from natural lime caves of Ondal Chemongok Hwanseon and Yongyeon which are located at Kangwon or chungcheongbook province in Korea and were identified to the genus level. Soil sam-ples were collected at 6 sites inside and 2 sites outside of each natural lime cave, As the result the strains belonging to genus Streptomyces and rare actinomycetes were isolated at the average of 2.1 and 3.4 strains per g soil on inside cave whereas which were isolated at the 6.0 and 1.8 strains per g soil on outside cave. How-ever the generic distribution of Streptomyces and rare actinomycetes isolated from outside cave was quite dif-ferent from that of inside cave. It was shown that rare actinomycetes at natural lime caves is generally highly abundant than Streptomyces.

• 한국미생물·생명공학회지
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• 제30권3호
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• pp.287-292
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• 2002

본 연구에서는 경안천 유역에 있는 주유소 오염토양으로부터 대표적인 아조계 염료 congo-red분해능이 우수한 토양 방선균, SMA-2를 분리 선별하고, SMA-2의 배양조건을 최적화하여 2,4-dichlorophenol의 산화에 관여하는 actinomycetes lignin peroxidase(ALiP)의 활성도에 대한 특성을 규명하였다. 기존에 보고된 방선균 유래 ALiP와는 달리, SMA-2유래 ALiP효소는 pH6에서 최고의 활성을 보였으며, 2,4-DCP와 $H_2$$O_2$에 대한 Km값이 각각 0.21mM과 8.5mM로 측정되었다. 또한 최적화된 배지에서 성장한 SMA-2의 배양액은 2,4-dichlorophenol 뿐만 아니라 2-chlorophenol, 2,4,6-trichlorophenol, 2,6-dichlorophenol, phenol, 4-chloropheno떼 대해서도 산화능을 보임으로써, 토양 방선균을 이용한 염화 페놀계 화합물이 포함된 오염 토양의 생복원 가능성을 제시하였다.

• 한국토양비료학회지
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• 제31권4호
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• pp.420-426
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• 1998

토양미생물(土壤微生物) 특히, 방선균(放線菌)의 수(數)는 천연유기물(天然有機物) 첨가구(添加區)가 그외 첨가물(添加物) 시용구(施用區)보다 월등히 높았으며, 또한 첨가(添加)되는 유기물(有機物)의 C/N비(比)에 따라서도 균수(菌數)의 변화(變化)가 있었다. C/N비(比)가 낮을수록 방선균수(放線菌數)의 증가(增加)는 크나 단기간에 감소(減少)하고 C/N비(比)가 높으면 지속적인 방선균수(放線菌數)유지를 보여준다. 그리고 방선균수(放線菌數)는 pH의 영향(影響)을 크게 받는다. 토양(土壤)의 pH가 배양후기(培養後期)로 접어들면서 감소(減少)하였고 토양중(土壤中) 미생물(微生物)의 균수(菌數)도 감소(減少)하였다. 방선균(放線菌)의 수(數)는 14일째 대조구(對照區)에서 4배(倍), 크로버 시용구(施用區)에서 36배(倍), 볏짚시용구(施用區)에서 20배(倍), 화학비료시용구(化學肥料施用區)에서 5배(倍), 유기질(有機質) 발효비료(醱酵肥料) 시용구(施用區)에서 4배(倍)의 증가(增加)를 보였다. 14일째의 방선균중(放線菌中) Streptomyces속(屬)의 비율(比率)은 대조구(對照區) 62%, 크로버 시용구(施用區) 60%, 볏짚 시용구(施用區) 68%, 화학비료(化學肥料) 시용구(施用區) 67%, 그리고 유기질(有機質) 발효비료(醱酵肥料) 시용구(施用區) 64%로 볏짚시용구(施用區)가 가장 높은 비율을 보였다.

• 한국토양비료학회지
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• 제20권1호
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• pp.77-84
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• 1987

볏짚 퇴비(堆肥) 및 무기질비료(無機質肥料)를 시용(施用)한 논토양(土壤)의 포장조건(圃場條件)에서 방선균(放線菌)의 군락(群落)을 경시적(經時的)으로 계수(計數)하고, 이들 분리균주(分離菌株)들의 형태적(形態的) 및 생리적(生理的) 특성(特性)과 전자현미경(電子顯微鏡)상에서 균(菌)의 포자체(胞子體) 형태(形態)를 관찰(觀察)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 방선균(放線菌)의 균수(菌數)는 $2.1{\times}10^6$에서 $7.4{\times}10^7$ 의 범위(範圍)로 무기질비료(無機質肥料)보다 퇴비(堆肥) 시용시(施用時) 많았으며, 연중(年中) 방선균(放線菌)의 경시적(經時的) 군락(郡落)은 1월(月)과 9월(月)보다 6월중(月中)에 채취(採取)한 토양(土壤)에서 많았다. 2. 분리(分離)한 250개(個) 균주(菌株)의 방선균(放線菌)을 형태적(形態的) 특성(特性)으로 구분(區分)한 결과(結果) 21개군(個群)으로 분류(分類)되었으며, 이들 각군(各群)들중 Streptomyces 속(屬)은 15개군(個群)의 87.2%, 그리고 non-Streptomyces 속(屬)은 6개군(個群)의 12.8%로 확인(確認)되었다. 또한 전체(全體) 분리균주(分離菌株)중 포자체(胞子體)의 Spiral Chain 형태(形態)의 Streptomyces 속(屬)이 80%로서 우점하였다. 3. Streptomyces 속(屬)의 15개군(個群)을 전자현미경(電子顯微鏡)상에서 포자체(胞子體)의 표면형태(表面形態)를 관찰(觀察)한 결과(結果) 3개군(個群)은 spiny 형태(形態)를 보였고, 12개군(個群)은 smooth 형태(形態)를 갖는 것으로 동정(同定)되었다.

• Journal of Microbiology
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• 제39권1호
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• pp.17-23
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• 2001

Various pretreatment procedures and selective media were applied to assess the optimal conditions for the isolation of rare actinomycetes from soil. Pretreatment of wet-heating for 15 min at 70$^{\circ}C$ and phenol treatment of soil suspension were the most effective methods for the isolation of these microorganisms. Hair hydrolysate vitamin agar (HHVA) was the most suitable medium for the recovery of rare actinomycetes. Thirty-five rare actinomycete strains were chosen using selective isolation approaches, then morphological and chemical properties of the isolates were determined. The isolates belonged to one of the following genus, Micromonospora, Microbispora, Actinoplanes and Streptosporangium.

• 한국치위생학회지
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• 제1권2호
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• pp.193-200
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• 2001

An appropriate amount of samples, collected from three each paddy forest, field and riverside soil near Taegu city, was suspended in sterile water and then diluted in order to isolation of antagonistic to oral cancer. The diluted samples were inoculated on separating medium in the routing spreading method. So, seven hundred and eighteen strains were isolated on HV agar and 220 strains were on methanol medium from soil samples. So, during the screening of anti-oral cancer activity from soil, we isolated microorganisms showing powerful antagonistic activity. Among them, No. 78 strain exhibited the most strongly anti-oral cancer activity. Microbiological properties were investigated by the methods described in the Bergey's Manual of Systematic Bacteriology and experimental methods of identification of actinomycetes by Hamada et al. As a result, a methylotrophic actinomycetes strain No. 79 was estimated as Amycolatopsis sp. based on taxonomic studies.

• 한국미생물·생명공학회지
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• 제22권2호
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• pp.222-225
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• 1994

Three kinds of pretreatment methods were used for selectivel isolation of soil actinomy cetes. One hundred and six strains were isolated on Bennet's agar and 114 strains were on humic acid-vitamin agar from 5 domestic soil samples. All of these isolates were identified to the genus level based on morphological and physiological characheristics. Among three methods, dry heat was most effective to isolate many different strains including rare actinomycetes. On genus, Bennet's agar was effective for selective isolation of Nocardia but bumic acid-vitamin agar for another rare actinomycetes.

• 농업과학연구
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• 제37권2호
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• pp.255-260
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• 2010

Rusty root, the browning disease on ginseng, decreases quality and value. Recent studies indicated that endophytic bacteria could be a possible cause of rusty root. Actinomycetes antagonistic to the rusty-root-causing bacteria were isolated from soil. Twenty nine out of 932-isolates of Actinomycetes from soil showed antibacterial activity against Agrobacterium tumefaciens and Pseudomonas veronii an endophytic isolate in ginseng. The strongest antibacterial strain(ATO4O104) was classified based on 16S rDNA sequence. The Actinomycetes strain, ATO4O104, isolated in soil of USA volcano national park was identified as Streptomyces adephospholyticus. To test plant toxicity, radish seeds were sprouted with the culture of S. adephospholyticus and it did not show any harmful effect. The butanol partition out of n-hexane, ethyl acetate, butanol, and water partions showed the highest antibacterial activity.