|
|
|
| Registros recuperados: 17 | |
|
|
| Chanthasena,Panjamaphon; Nantapong,Nawarat. |
| The increasing use of antibiotics has led to the development of drug-resistant microorganisms. The emergence of resistant strains has compromised the treatment and control of infectious diseases. As a result, the search and development of a novel class of antibiotic drugs are required. Actinomycetes have been recognized as a richest source of secondary metabolites including antibiotics. The aim of this study was to investigate the diversity of antibiotic-producing soil Actinomycetes from dry dipterocarp forest in Northeast of Thailand. The soil from this area has been known for its poor in nutrients and highly acidic with pH values around 4.5. In such a harsh condition, soil-inhabiting Actinomycetes elevate their protective mechanisms by inducing the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil bacteria; Antibiotics; Actinomycetes; Streptomyces. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100417 |
| |
|
|
| Sousa,Carla da Silva; Soares,Ana Cristina Fermino; Garrido,Marlon da Silva. |
| Studies with streptomycetes in biocontrol programs and plant growth promotion are presented as technological alternatives for environmental sustainable production. This work has the objective of characterizing six isolates of streptomycetes aiming the production of extracellular enzymes, indole acetic acid, capacity for phosphate solubilization, root colonization and growth under different pH and salinity levels. For detection of enzyme activity the isolates were grown in culture media with the enzyme substrates as sole carbon source. The root colonization assay was performed on tomato seedlings grown on 0.6% water-agar medium. Growth under different pH and salinity levels was evaluated in AGS medium with 1%, 1.5%, 2%, 2.5%, and 3% NaCl, and pH levels... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinomycetes; Indole acetic acid; Extracellular enzymes; Siderophores. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100007 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Soares,Ana Cristina Fermino; Sousa,Carla da Silva; Garrido,Marlon da Silva; Perez,Jane Oliveira. |
| Actinomycetes are important plant disease control and growth promotion agents, which makes it necessary to develop technology to produce large quantities of inoculum for green-house and field work. The present study had the objective of evaluating the growth of several isolates of Streptomyces in sterile rice for inoculum production. The sterile rice was inoculated with isolates of S. thermotolerans, S. griseus subsp. griseus, Streptomyces sp. N0035, S. purpurascens, and Streptomyces sp., and incubated at 28 ± 2ºC. Five days after its inoculation, mycelial growth and sporulation was observed for all Streptomyces isolates on the rice grains. Twelve days after incubation, the colonized rice was transferred to envelopes of dark brown paper and let to dry in... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Actinomycetes; Biological control; Growth substrates. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600013 |
| |
|
|
| Kumar,Vijay; Bharti,Alpana; Negi,Yogesh Kumar; Gusain,Omprakash; Pandey,Piyush; Bisht,Gajraj Singh. |
| Actinomycetes from earthworm castings were isolated and screened for their antimicrobial activity and industrial enzymes. A total of 48 isolates were obtained from 12 samples of earthworm castings. Highest numbers of isolates were recovered from forest site (58.33 %) as compared to grassland (25%) and agricultural land (16.66%). The growth patterns, mycelial coloration of abundance actinomycetes were documented. The dominant genera Identified by cultural, morphological and physiological characteristics were Streptomyces (60.41%) followed by Streptosporangium (10.41%), Saccharopolyspora (6.25%) and Nocardia (6.25%). Besides these, other genera like Micromonospora, Actinomadura, Microbispora, Planobispora and Nocardiopsis were also recovered but in low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial activity; Enzymes; Earthworm castings; Actinomycetes. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100022 |
| |
|
|
| SILVA,Germana Michelle de Medeiros e; BEZERRA,Raquel Pedrosa; TEIXEIRA,José António; SILVA,Flávio Oliveira; CORREIA,Juliana Mendes; PORTO,Tatiana Souza; LIMA-FILHO,José Luis; PORTO,Ana Lúcia Figueiredo. |
| ABSTRACT Thrombosis is a pathophysiological disorder caused by accumulation of fibrin in the blood. Fibrinolytic proteases with potent thrombolytic activity have been produced by diverse microbial sources. Considering the microbial biodiversity of the Amazon region, this study aimed at the screening, production and biochemical characterization of a fibrinolytic enzyme produced by Streptomyces sp. isolated from Amazonian lichens. The strain Streptomyces DPUA1576 showed the highest fibrinolytic activity, which was 283 mm2. Three variables at two levels were used to assess their effects on the fibrinolytic production. The parameters studied were agitation (0.28 - 1.12 g), temperature (28 - 36 ºC) and pH (6.0 - 8.0); all of them had significant effects on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinomycetes; Fibrinolytic protease; Inhibitor protease; Fibrinogenolytic activity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000300323 |
| |
|
|
| Lakshmanaperumalsamy, P; Chandramohan, D; Natarajan, R. |
| A seasonal study on the occurrence and distribution of total aerobic microbial population (TMP), total aerobic heterotrophic bacteria (THB), actinomycetes and fungi in the sediments of Vellar Estuary, South India (11 degree 29'N 79 degree 46'E) was carried out during Jan. to Dec. 1975. Sediment samples were collected at monthly intervals, from 4 stations and analysed microbiologically. In general, bacterial population was found to be dominant followed by actinomycetes and fungi. The max peak for TMP, THB and fungi were recorded in Nov. in all stations. Monsoon season supported TMP, THB and fungi to a high level and it was summer for actinomycetes. Statistical analysis (Kendall's tau) showed a significantly positive correlation among TMP, THB, actinomycetes... |
| Tipo: Text |
Palavras-chave: Actinomycetes; Population number; Statistical analysis; Seasonal variations; Fungi; Bacteria; Sediment analysis; Microbiological analysis. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-943.pdf |
| |
|
|
| Soares,Ana Cristina Fermino; Sousa,Carla da Silva; Garrido,Marlon da Silva; Perez,Jane Oliveira; Almeida,Nailson Santos de. |
| Yam (Dioscorea cayennensis Lam), an important crop in the Northeastern region of Brazil, is susceptible to the attack of several phytopathogenic fungi, such as Curvularia eragrostides (Henn.) Meyer and Colletotrichum gloeosporioides (Penz.), which cause leaf spot diseases. This work aimed to evaluate the effect of six actinomycete isolates (S. thermotolerans, S. griseus subsp. griseus, Streptomyces sp. N0035, S. purpurascens, and two isolates identified as Streptomyces sp.), as well as the effect of their secondary metabolites, on mycelium growth and spore germination of C. eragrostides and C. gloeosporioides, from yam plants, cultivar da Costa. Additionally, the chitinolytic activity of these actinomycete strains was determined in a minimum salt growth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biocontrol; Dioscorea cayennensis; Actinomycetes; Secondary metabolites. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400010 |
| |
|
| |
|
| |
|
| |
|
| |
| Registros recuperados: 17 | |
|
|
|
