• Title/Summary/Keyword: soil actinomycetes

Search Result 251, Processing Time 0.028 seconds

Distribution of Oligotrophic Actinomycetes in Forest Soil. (산림 토양 중 저 영양성 방선균의 분포)

  • Jeong, Eun-Ye;Lee, Sang-Hwa;Park, Dong-Jin;Lee, Hyang-Burm;Piao, Zhe;Kim, Chang-Jin
    • Microbiology and Biotechnology Letters
    • /
    • v.28 no.4
    • /
    • pp.239-241
    • /
    • 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.

  • PDF

A New Medium for the Selective Isolation of Soil Actinomycetes (토양중 방선균의 선택적 분리를 위한 배지)

  • Cho, Seong-Hag;Hwang, Cherl-Won;Chung, Ho-Kweon;Yang, Chang-Sul
    • Microbiology and Biotechnology Letters
    • /
    • v.22 no.5
    • /
    • pp.561-563
    • /
    • 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.

  • PDF

Genus Diversity of Soil Actinomycetes Isolated from Natural Lime Cave. (자연 석회동굴에서 분리한 방선균의 속 다양성)

  • 박동진;이상화;박해룡;권오성;박상호;마사카즈우라모토;김창진
    • Microbiology and Biotechnology Letters
    • /
    • v.28 no.3
    • /
    • pp.129-133
    • /
    • 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.

  • PDF

Degradation of Chlorinated Phenolic Compounds by Soil Actinomycetes Isolated from the Contami-nated Soil Nearby the Kyung-An River (경안천 유역 오염토양에서 분리한 방선균의 염화 페놀계 화합물 분해)

  • 김성민;김창영;김응수
    • Microbiology and Biotechnology Letters
    • /
    • v.30 no.3
    • /
    • pp.287-292
    • /
    • 2002
  • Lignin-peroxidase (LiP) has been considered as one of the most important industrial enzymes for biodegradation of various recalcitrant toxic compounds such as chlorinated aromatic hydrocarbons and azo-dyes. Recently, several soil actinomycetes have been reported to secrete a functionally-similar lignin-peroxidase called actinomycetes lig-nin-peroxidase (ALiP). In this manuscript, we isolated over 100 morphologically distinct actinomycetes from the contaminated soils around 10 different gas stations located nearby the Kyung-An river. Among these actinomycetes screened based on the congo-red dye-decolorization activities, one newly-isolated actinomycetes named SMA-2 showed the most significant dye-decoloring activity on the congo-red plate as well as a significant ALiP activity in a yeast-extract-malt-extract liquid media supplemented with starch. The optimum SMA-2 culture condition fur ALiP production was determined and the kinetic parameters fur the SMA-2 AkIP activity were characterized. The optimally-cultured SMA-2 also exhibited the oxidation activities toward various recalcitrant aromatic compounds including phenol, 2- chlorophenol, 4- chlorophenol, 2,4- dichlorophenol ,2,6- dichlorophenol, and 2,4, f-trichlorophe - not, suggesting a potential application of SMA-2 for contaminated soil bioremediation.

Effect of Chemical Fertilizers and Organic Materials on Soil Actinomycetes Flora (화학비료(化學肥料) 및 유기물(有機物) 시용시(施用時) 방선균(放線菌) Flora의 구성변화(構成變化))

  • Hong, Sa-Hyun;Yang, Chang-Sool
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.31 no.4
    • /
    • pp.420-426
    • /
    • 1998
  • This investigation was undertaken to clarify the effects of application of chemical fertilizers (Compound fertilizer and commercial compost) and organic matters (straw and clover) on changes of the composition of soil actinomycetes flora. Actinomycetes were isolated from chemical fertilizer and organic materials treated soils, and then grown on HV agar plate. The isolated strains were classified by Bergey's manual based on the morphological characteristics and color of substrate mycelium of actinomycetes. The number of actinomycetes increased 4 times in control, 36 times in clover, 20 times in straw, 5 times in chemical fertilizer and 4 times in commercial compost treated soil after 14th day of incubation. This result suggests that the application of straw or clover is more effective to increase the number of actinomycetes than compound fertilizer or commercial compost. It also showed that the application of chemical fertilizer or organic materials considerably changed the composition of soil actinomycetes flora. The proportion of streptomyces strains to the isolated total actinomycetes was 62% in control, 60% in clover, 68% in straw, 67% in chemical fertilizer and 64% in commercial compost treated soils at the 14th day.

  • PDF

Studies on Some Physiological and Morphological Characteristics of Actinomycetes in Paddy Soil applied Organic Materials (유기물(有機物) 시용시(施用時) 논 토양(土壤)에서 방선균(放線菌)의 형태(形態) 및 생리학적(生理學的) 특성(特性))

  • Park, Kyung-Soo;Park, Youl;Ryu, Jin-Chang
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.20 no.1
    • /
    • pp.77-84
    • /
    • 1987
  • The population of actinomycetes in paddy soils, with hay compost and inorganic fertilizer had been applied respectively was investigated. Actinomycetes were isolated by using selective medium and the population densities of actinomycetes in paddy soil was examined. The population of actinomycetes were reached at a range from $2.1{\times}10^6$ to $7.4{\times}10^7$ per gram of the soil. The composition of actinomycetes flora changed considerably after hay compost applied. The significant positive correlations between the organic matter content in paddy soil and the actinomycetes populations were given at 1.38 to 2.69 level. According to the result of several morphological observation, similar strains isolated were classified into 21 groups. More detailed taxonomic characterization were carried out on the isolated strains. Therefore, 15 groups of Streptomyces and 6 groups of non-Streptomyces were classified into actinomycetes isolates, percentage of streptomyces and non-Streptomyces strains were 87.2% and 12.8% in the isolated 250 actinomycetes strains respectively. Streptomyces with sporophore of the spiral chain form accounted for 80% of all the Streptomyces isolates. Surface morphology of spores were determined with the electron microscope, three species have a spiny surface, and 13 strains have a smooth spore surface.

  • PDF

An Improved Selective Isolation of Rare Actinomycetes from Forest Soil

  • Seong, Chi-Nam;Park, Ji-Heok;Baik, Keun-Shik
    • Journal of Microbiology
    • /
    • v.39 no.1
    • /
    • pp.17-23
    • /
    • 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.

  • PDF

Isolation and Identification of Methylotrophic Actinomycetes capable of Producing Anti-oral Cancer Activity (구강암에 대해 항암효과를 나타내는 methanol 자화 방선균의 분리 및 동정)

  • Kim, Jung;Kim, Sun-Sook
    • Journal of Korean society of Dental Hygiene
    • /
    • v.1 no.2
    • /
    • pp.193-200
    • /
    • 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.

  • PDF

Selective Isolation of Actinomycetes by Physical Pretreatment of Soil Sample (토양시료의 열처리에 의한 방선균의 선택적 분리)

  • Kim, Chang-Jin;Lee, Kang-Hyun;Kwon, Oh-Sung;Shimazu, Akira;Yoo, Ick-Dong
    • Microbiology and Biotechnology Letters
    • /
    • v.22 no.2
    • /
    • pp.222-225
    • /
    • 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.

  • PDF

Screening and Identification of Antibacterial Actinomycetes against Bacteria Causing Rusty Root on Ginseng (인삼의 적변을 유발하는 세균에 대하여 항균활성을 가지는 방선균 선발 및 동정)

  • Han, Sung-Hee;Ryu, Dong-Kul;Choi, Seung-Hyun;Choi, Jae-Eul;An, Gilh-Wan
    • Korean Journal of Agricultural Science
    • /
    • v.37 no.2
    • /
    • pp.255-260
    • /
    • 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.