Actinomycetes from Soil of Lachung, a Pristine High Altitude Region of Sikkim Himalaya, Their Antimicrobial Potentiality and Production of Industrially Important Enzymes

Singh, Laishram Shantikumar; Sharma, Hemant

doi:10.4236/aim.2019.98046

Cited by 12 publications

(5 citation statements)

References 61 publications

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“…Out of the 22 isolates, 12 (54%) presented antagonistic activity towards at least one microorganism-test, 11 (50%) isolates exhibited antifungal activity and 6 (27%) isolates showed antibacterial antagonism. Our results corroborate with those obtained by Singh et al (2019), where they found that 23% of the isolates had antibacterial activity, while 47% were able to inhibit fungi. However, Boudmagh et al (2005) reported that, among the 27 isolates of arid soil, only 7% showed antifungal activity.…”

Section: Screening Of Antagonistic Isolatessupporting

confidence: 92%

“…Several studies on the antagonistic activity of rhizospheric Streptomyces have been documented (Khamna et al 2009;Anwar et al 2016;Aouar et al 2016;Sharma and Manhas, 2020) since it is the largest and the active genus among actinobacteria, and 75% of biologically active compounds are produced by members of this genus (Singh et al 2019). However, to our knowledge, very few publications are available in the literature that explores antagonistic activity of S. albidoflavus, S. enissocaesilis, and most particularly S. flaveus.…”

Section: Enissocaesilismentioning

confidence: 99%

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Identification of antagonistic Streptomyces strains isolated from Algerian Saharan soils and their plant growth promoting properties

2020

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Abstract. Aouar L, Boukelloul I, Benadjila A. 2020. Identification of antagonistic Streptomyces strains isolated from Algerian Saharan soils and their plant growth promoting properties. Biodiversitas 21: 5672-5683. To produce new bioactive substances of agricultural interest, extreme ecosystems can be a source of unexplored microorganisms. Accordingly, in this study, twenty-two actinobacteria strains were obtained from rhizospheric arid soils of palm groves collected from Biskra and El Oued in the Algerian Sahara. All isolates were examined for the in vitro antifungal potential towards phytopathogenic fungi: Aspergillus flavus, Verticillium dahlia, Rhizoctonia solani, Botrytis cinerea and Fusarium oxysporum as well as for their antibacterial property toward phytopathogenic bacteria: Streptomyces scabiei, Pectobacterium carotovorum and Agrobacterium tumefaciens. The three isolates (13%) that inhibited at least five pathogens were then selected, identified and assessed for their attributes to produce indole-3-acetic acid (IAA) and siderophores, to solubilize phosphate, and to antagonize Streptomyces scabiei in vivo. According to phylogenetic analysis performed with 16S rDNA sequence, chemotaxonomy and phenotypic characteristics, the strain SO1, which inhibited all tested pathogens, was assigned to Streptomyces flaveus. While, strains SO2 and SB1 were affiliated to Streptomyces enissocaesilis and Streptomyces albidoflavus, respectively. All strains produced IAA but only SO1 and SB1 were able to elaborate siderophores catecholate-type. Two strains SO1 and SO2 exhibited a capacity to solubilize phosphate and SO1 was able to suppress the pathogenic effect of Streptomyces scabiei on radish seedlings. The findings indicate that SO1 strain may reveal the potential for use as a biocontrol agent and plant growth promoter.

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Section: Screening Of Antagonistic Isolatessupporting

confidence: 92%

Section: Enissocaesilismentioning

confidence: 99%

Identification of antagonistic Streptomyces strains isolated from Algerian Saharan soils and their plant growth promoting properties

2020

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“…Also, Jeffrey (2008) [54] isolated 62 actinomycete isolates from the soil of Sarawak while Streptomyces atrovirens was isolated from the soil of Korea [55] while the isolated actinomycetes from different biotopes of Punjab, India showed a broad spectrum of antimicrobial activity [26]. Furthermore, 26 actinomycete isolates from Domang, India were obtaind, 12 (47%) of them had antifungal activity while 6 (23%) has antibacterial activity [56]. In addition, the threeisolated Actinobacteria showed broad-spectrum activity against Gram-positive and Gram-negative bacteria obtained from a soil sample, collected from Mount Everest [57].…”

Section: Important Secondary Metabolites Produced By Actinomycetesmentioning

confidence: 99%

Rare Actinomycetes from Undiscovered Sources as a Source of Novel Antimicrobial Agents to Control Multidrug-Resistant Bacteria

Alaidaroos¹

2022

Int J Pharm Res Allied Sci

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The major cause of death worldwide is infectious diseases and about 10 billion deaths, which represent 25% of all the major causes of death per year were recorded due to the rapidly increasing number of infections in hospitals among compromised and injured patients. Recently, the increasing prevalence of multi-drug resistant bacteria which cause serious healthcare-associated infections in hospitals were reported. The emergence of resistance to aminoglycosides, β lactam antibiotics, and methicillin-resistant Staphylococcus aureus cause serious risk for humans, and infections with resistant bacteria are difficult to treat. Vancomycin was earlier used to overcome the problem of methicillin-resistant S. aureus, but unfortunately, vancomycin-resistant S. aureus had appeared in hospitals. In addition, Pseudomonas aeruginosa, Acinetobacter baumannii, and Klebsiella pneumoniae received increasing attention as a determined as dangerous bacterial pathogens. Occurrence of penicillin-resistant Streptococcus pneumoniae is another resistant bacterium that cause infections in immunocompromised or old patients. As the rate of emergence of resistant isolates increased, the development of novel antibiotics is difficult. Actinomycetes, especially Streptomyces species are still the continuous sources of new products and more than two-thirds of the most used antibiotics are from actinomycetes. Streptomyces had the great biosynthetic ability to form antibiotics that stayed it without potential competition with other microbial genera. This review aimed to discuss the emergence of multidrug-resistant bacteria and their biocontrol with effective antimicrobial agents from rare actinomycetes. In conclusion, the development of novel antibiotics is still the aim of many studies, thus screening of new habitats for novel antibiotics is urgently needed.

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“…For long-term preservation, the purified colonies were scraped from agar plates using a scraper with 15% glycerol buffer solution, transferred to a sterile cryovial, and then stored at −80°C. The strain was incubated in SCA medium for 7 days at 28°C, and a single colony was incubated in casein-starch-peptone-yeast extract-malt extract (CSPY-ME) broth with shaking at 120 rpm at 28°C for 7 days ( 12 ). Genomic DNA from SJ1-7 was extracted using a MagAttract high-molecular-weight DNA kit (Qiagen, Hilden, Germany) as instructed by the manufacturer.…”

Section: Announcementmentioning

confidence: 99%

Draft Genome Sequence of Streptomyces Strain SJ1-7, a Soil Bacterial Isolate

Chi

Kim

et al. 2021

Microbiol Resour Announc

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Actinomycetes from Soil of Lachung, a Pristine High Altitude Region of Sikkim Himalaya, Their Antimicrobial Potentiality and Production of Industrially Important Enzymes

Cited by 12 publications

References 61 publications

Identification of antagonistic Streptomyces strains isolated from Algerian Saharan soils and their plant growth promoting properties

Identification of antagonistic Streptomyces strains isolated from Algerian Saharan soils and their plant growth promoting properties

Rare Actinomycetes from Undiscovered Sources as a Source of Novel Antimicrobial Agents to Control Multidrug-Resistant Bacteria

Draft Genome Sequence of Streptomyces Strain SJ1-7, a Soil Bacterial Isolate

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