Isolation properties and potential applications of thermophilic actinomycetes

Edwards, C.

doi:10.1007/bf02788050

Cited by 44 publications

(25 citation statements)

References 40 publications

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“…Like other soil bacteria, Actinobacteria are mostly mesophilic, with optimal growth at temperatures between 25 and 30°C. However, thermophilic Actinobacteria can grow at temperatures ranging from 50 to 60°C (9). Vegetative growth of Actinobacteria in the soil is favored by low humidity, especially when the spores are submerged in water.…”

Section: Biology Of Actinobacteriamentioning

confidence: 99%

Taxonomy, Physiology, and Natural Products of Actinobacteria

Barka

Vatsa

Sanchez

et al. 2016

Microbiol Mol Biol Rev

1,600

1,048

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SUMMARYActinobacteriaare Gram-positive bacteria with high G+C DNA content that constitute one of the largest bacterial phyla, and they are ubiquitously distributed in both aquatic and terrestrial ecosystems. ManyActinobacteriahave a mycelial lifestyle and undergo complex morphological differentiation. They also have an extensive secondary metabolism and produce about two-thirds of all naturally derived antibiotics in current clinical use, as well as many anticancer, anthelmintic, and antifungal compounds. Consequently, these bacteria are of major importance for biotechnology, medicine, and agriculture.Actinobacteriaplay diverse roles in their associations with various higher organisms, since their members have adopted different lifestyles, and the phylum includes pathogens (notably, species ofCorynebacterium,Mycobacterium,Nocardia,Propionibacterium, andTropheryma), soil inhabitants (e.g.,MicromonosporaandStreptomycesspecies), plant commensals (e.g.,Frankiaspp.), and gastrointestinal commensals (Bifidobacteriumspp.).Actinobacteriaalso play an important role as symbionts and as pathogens in plant-associated microbial communities. This review presents an update on the biology of this important bacterial phylum.

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Section: Biology Of Actinobacteriamentioning

confidence: 99%

Taxonomy, Physiology, and Natural Products of Actinobacteria

Barka

Vatsa

Sanchez

et al. 2016

Microbiol Mol Biol Rev

1,600

1,048

View full text Add to dashboard Cite

show abstract

“…Actinomycetes are an important source of new bioactive compounds such as antibiotics and enzymes (Vining 1992;Edwards 1993;Demain 1995;Xu et al 2005) which have diverse clinical effects and are active against many kinds of organisms (bacteria, fungi, parasites etc.). In fact more than 50% of the known natural antibiotics produced are from actinomycetes (Miyadoh 1993).…”

Section: Introductionmentioning

confidence: 99%

Actinomycetes from Moroccan habitats: isolation and screening for cytotoxic activities

Anibou

Chait²,

Zyad

et al. 2008

World J Microbiol Biotechnol

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In our screening for actinomycetes showing cytotoxic activities, 8 samples were collected from various Moroccan habitats, 136 isolates were tested for their capacity to produce antibacterial compounds against gram positive bacteria. Thirty-seven strains of these isolates were active against Gram-positive bacteria. Using the following steps of primary screening: antibacterial activity, confrontation between the isolates and toxicity to Artemia salina; fifteen different isolates were used for further investigation. The aqueous extracts of Streptomyces sp. T5 and Streptomyces sp. AS8 were selected for their cytotoxic activity against Hep2, BSR and P815 cell lines, and two active compounds were observed on HPLC. The two isolates exhibited high activity against human cancer cell lines and were inactive on PBMC cell lines. Furthermore, the Streptomyces sp. T5 extract showed a proliferative activity.

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“…The microorganisms were primarily mesophilic or thermophilic (Table 1). Actinomycetes comprise a diverse group of largely mycelial bacteria, many of which are ecologically important and have commercial potential for enzyme and antibiotic production (Edwards, 2007). Actinomycetes can degrade some cellulose, and solubilize lignin, and tolerate higher temperatures and pH than fungi.…”

Section: Resultsmentioning

confidence: 99%

Activity of cellulase from Thermoactinomycetes and Bacillus spp. isolated from Brassica waste compost

Chang

Wang

et al. 2009

Sci. agric. (Piracicaba, Braz.)

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Plant wastes present a high cellulose content, which is an ideal organic material for composting. Five strains of thermophiles from processed Brassica waste were isolated, and the hydrolytic activity on various cellulosic biomass substrata and their temperature profiles were determined. 16S rRNA sequencing identified these strains as Thermoactinomyces and Bacillus spp. Maximal cellulase activity corresponded to 2.3 U mL -1 of enzyme. The application of these strains on Brassica rapa residues demonstrates increased total nitrogen content). TA-3, a Thermoactinomycetes sp. strain, performs best among all inoculants, increasing the nitrogen content from 0.74 to 0.91%, and decreasing the carbon content from 15.4 to 12.2%, showing its high efficiency and bioactivity during compositing. Key words: cellulose degrading, enzymes, vegetable wastes ATIVIDADE DE CELULASE DE TERMOACTINOMICETOS E BACILLUS spp. ISOLADOS DE RESÍDUOS DERIVADOS DE COMPOSTOS DE BRASSICARESUMO: Resíduos vegetais apresentam alta concentração de celulose, que é um material orgânico ideal para preparação de composto. Cinco linhagens de termófilos foram isoladas de resíduos processados de Brassica e a atividade hidrolítica em vários substratos contendo celulose e seus padrões de temperatura foram determinados. O seqüenciamento de rRNA 16S permitiu a identificação dessas isolados como Thermoactinomyces e Bacillus spp. A atividade máxima de celulase foi determinada como de 2,3 U mL -1 de enzima. O uso dessas linhagens em resíduos de Brassica rapa resultou em um aumento total do conteúdo de nitrogênio. TA-3, uma linhagem de Thermoactinomycetes sp., apresentou melhor desempenho entre os inoculantes, aumentando o conteúdo de nitrogênio de 0,74 para 0,91%, e diminuindo o conteúdo de carbono de 15,4 para 12,2%, mostrando sua alta eficiência e bioatividade durante a compostagem. Palavras-chaves: degradação de celulose, enzimas, resíduos vegetais

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Isolation properties and potential applications of thermophilic actinomycetes

Cited by 44 publications

References 40 publications

Taxonomy, Physiology, and Natural Products of Actinobacteria

Taxonomy, Physiology, and Natural Products of Actinobacteria

Actinomycetes from Moroccan habitats: isolation and screening for cytotoxic activities

Activity of cellulase from Thermoactinomycetes and Bacillus spp. isolated from Brassica waste compost

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