Actinomycetes isolated
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The marine environmental conditions are particularly different from terrestrial ones; recent studies have showed that marine actinomycetes might produce many novel compounds with good biological activity. The objective of this study is to isolate and screen actinomycetes strains from the marine environment with activity against pathogenic microorganisms.
9p vimulcahy 18-09-2023 4 3 Download
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The results showed that 02 bacterial strains and 06 actinomycete strains were selected from 32 isolates. Then, we optimized the growing conditions of the screened microorganisms. Among actinomycetes strains PU1.1, PU2.1 gave the highest weight loss results, therefore they were selected for further study. Our results showed that TG2.1 and CM4.1 are Bacillus subtilis. PU1.1 is Streptomyces lilacs, while PU1.2 is Streptomyces Misiones. The selected microorganisms belong to risk group level 1 (safety group).
10p nhanchienthien 25-07-2023 4 2 Download
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Mangrove endophytes have recently gained considerable attention due to their diversity and abundance of novel bioactive secondary metabolites. Despite the fact that Streptomyces species are producers of more than 75% of commercialized antibiotics, Streptomyces associated with the extremely widespread mangrove plant Avicennia marina remain poorly characterized. In this study, nine actinomycetes were isolated from A. marina growing in a mangrove forest, as yet unexplored, of Quang Ninh province, Vietnam.
12p vicaptainmarvel 21-04-2023 6 2 Download
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Over the past decades, researchers and scientists have paid more and more attention to the discovery of novel antibiotics and anticancer agents in fighting infection and cancer diseases. It is believed that endophytic actinomycetes from medicinal plants provide abundant resources for new compounds with significant bioactive properties. In the present study, we assessed antibacterial and cytotoxic activities of endophytic actinomycetes associated with Litsea cubeba (Lour.) Pers.
11p vidudley 20-02-2023 7 2 Download
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Results of the batch fermentation showed an earlier production of CHO enzyme with 4% increase in activity compared to that obtained from shake flask cultures indicated that Streptomyces sp. strain NHIA_CH5 could be a potential source of CHO enzyme for commercial purpose.
7p mudbound 10-12-2021 7 1 Download
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In the present study it was aimed to obtain novel strains of actinomycetes that have the ability to promote plant growth. For this, seven soil samples from the rhizosphere of Humulus lupulus (Pazaryeri, Bilecik) were used and potential isolates were obtained. 16S rRNA genes of 30 isolates were amplified by PCR and sequenced. Eighteen isolates were found to be closely related to Streptomycetes spp. and they were tested for their proteolytic activity, cellulase activity, phosphate solubility, IAA production, biofilm formation, and growth in nitrogen-limited medium.
17p thiencuuchu 27-11-2021 4 1 Download
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Five secondary metabolites including three flavonoids, 6-lavandulyl-5,7,2′,4′-tetrahydroxyflavanone (1), 5′- lavandulyl-2′-methoxy-2,4,4′,6′-tetrahydroxychalcone (2), 6-lavandulyl-7-methoxy-5,2′,4′-trihydroxyflavanone (3), and two alkaloids, tryptoline (4), and norharman (5) were isolated from the culture broth of Streptomyces sp. C011. Their structures were determined by spectral data analysis, including MS, 2D NMR, and CD spectrum. All the separated compounds were evaluated for their antimicrobial activities. Compounds 1, 2, 3 and 5 exhibited antimicrobial activity...
5p cothumenhmong11 06-05-2021 13 2 Download
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The present investigation was undertaken to isolate, characterize and screen the actinomycetes from salt pan sediment soils.
13p trinhthamhodang11 27-04-2021 11 2 Download
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A survey was conducted in Tamil Nadu and Maharashtra to isolate the actinomycetes from the soil samples for study. Twenty seven cultures of actinomycetes were isolated, purified and designated as actinomycetes (A1 to A27). The test cultures A1 to A27 were taken for studying their acaridical activity. Preliminary screening revealed that five of the isolates were active against spider mite, Tetranychus urticae on okra. Out of the sixteen isolates A7 and A27 isolate showed highest activity against red spider mite, Tetranychus urticae.
8p nguaconbaynhay10 22-01-2021 13 2 Download
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The present research was undertaken to study the antagonistic effect of potential endophytic actinomycete isolate on the growth of Fusarium oxysporum on musk melon plants under greenhouse conditions.
7p cothumenhmong9 18-01-2021 10 2 Download
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In the present study, an attempt has been made to explore the bioactive rhizosphere actinomycetes for suppressing the pathogen. Rhizosphere soil samples were collected from various locations in The Nilgiris and Coimbatore districts and twenty seven different actinomycetes were isolated.
8p trinhthamhodang9 16-12-2020 8 2 Download
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Actinomycetes have got considerable attention worldwide due to the production of many useful bioactive metabolites. In the present study, the antimicrobial potential of novel Actinomycetes has been evaluated by the initial screening of seven rhizosphere samples in Egypt. The primary and secondary screening were performed against Bacillus cereus (ATCC33018), and E.coli O157 (ATCC93111) as model strains of Gram positive and Gram negative species, respectively.
12p trinhthamhodang9 16-12-2020 19 2 Download
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The number and distribution of actinomycetes are very different in 10 species. In this study, 114 endophytic actinomycetes were isolated from 10 mangrove species in Giao Thuy, Nam Dinh: of which 44 strains were from their fruits, 40 from leaves, 21 from roots; 5 from trunks and 4 from flowers.
7p tamynhan9 02-12-2020 8 2 Download
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The study of actinomycetes strains from mountain soils are important because they are an extreme environment which has not been extensively studied but is believed to have a large diversity of organisms that have not yet been discovered. On this basis, it is presumed that the chances of isolating novel actinomycetes from these soils are high.
10p angicungduoc8 07-11-2020 11 1 Download
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In this study we examined diversity and activities of some actinomycetes isolated from mangroves in Giao Thuy, Nam Dinh Province. The distribution of actinomycetes in soil is strongly affected by external factors. Extra-cellular enzyme producing ability of mangrove actinomycetes is very high, particularly the ability of producing cellulase degrading filter paper (122/128 strains), CMC (110/128 strains), protease (83/128 strains) and amylase (78/128 strains).
8p tamynhan8 04-11-2020 13 2 Download
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The present study was undertaken to isolate endophytic and rhizospheric actinomycetes from Gladilous and to evaluate their plant growth promoting traits. Out of 90 isolates, 40 were from rhizospheric soil and 50 from roots of Gladiolus plants. Sixteen isolates from rhizospheric and 14 from endophytic were observed to produce IAA ranged from 4.3-79.9 µg/ml. Eighteen (20%) isolates were observed to solubilize phosphate in the range of 6.1- 64.5mg/100ml.
11p chauchaungayxua8 03-10-2020 6 1 Download
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In the present study the isolated endophytic actinomycete from the banana root and leaf tissues have been tested for their bioactivities and quantitative production of extracellular chitinase against phytopathogenic fungi Fusarium oxysporum that cause economically important disease in banana crop and to identify potent antagonistic strain.
10p trinhthamhodang1215 23-09-2020 8 1 Download
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In the present study, 8 Actinomycetes were isolates from rhizospheric soil from Karanja (Lad) District wahism. Out of 8 Actinomycetes isolates, two isolates was found to be sensitive against all isolates and shows very excellent zone of inhibition. Antagonastic activity against human pathogens like, S. aureus, E. coli, P. aeruginosa and P. vulgaris, was also carried out. From the complete observation it was noticed that isolate N obtained from neem soil and H from Hibiscus soil is having excellent antagonistic activity in controlling all the test pathogens.
9p dayhoctainha 10-09-2020 22 1 Download
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Replant disease is a major problem of apple orchards, which is a main cash crop in TransHimalayan region. The cause of this replant problem includes both biotic and abiotic factors, such as low nutrients, phytotoxins, actinomycetes, fungal complexes and nematodes. Fungi and oomycetes belonging to the well-known root rot complex are important factor of replant problems in apple.
7p angicungduoc6 22-07-2020 9 1 Download
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Traditional organic farming practices are beneficial but in most of the cases the science behind it is not well understood. The aim of present study was selection of grassroots practice from SRISTI database and its validation for crops growth promotion. Formulation was prepared and studied for their microbial content and growth. Results showed maximum bacterial population as compared to fungi and actinomycetes population. Five bacterial isolates showed phosphate solubilizing activity and these isolates were further studied as bioinoculants for Zea mays L. growth in pot experiment.
10p kethamoi6 29-06-2020 12 1 Download