Molecular Characterization of Antagonistic Streptomyces Isolated from a Mangrove Swamp

Kan, R. Rajesh; Prakash, Swadesh

doi:10.3923/ajbkr.2011.237.245

Cited by 18 publications

(3 citation statements)

References 6 publications

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“…Previous studies have shown that mangrove rhizosphere soils are rich in streptomycetes 77–80 . In the complex nature of mangrove rhizosphere environment, generation of root exudates could be the stimuli for species richness and chemical diversity of streptomycetes 78,79 . This rationalizes the higher number of Streptomyces isolates recovered from rhizosphere soil samples especially for those collected at sites KTTAS1, KTTAS2, and KTTAS3 as compared to that of sediment samples collected at site KTTAS6.…”

Section: Discussionmentioning

confidence: 99%

Diversity of Streptomyces spp. from mangrove forest of Sarawak (Malaysia) and screening of their antioxidant and cytotoxic activities

Law

Chan

et al. 2019

Sci Rep

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Streptomycetes have been the center of attraction within scientific community owing to their capability to produce various bioactive compounds, for instance, with different antimicrobial, anticancer, and antioxidant properties. The search for novel Streptomyces spp. from underexplored area such as mangrove environment has been gaining attention since these microorganisms could produce pharmaceutically important metabolites. The aim of this study is to discover the diversity of Streptomyces spp. from mangrove in Sarawak and their bioactive potentials — in relation to antioxidant and cytotoxic activities. A total of 88 Streptomyces isolates were successfully recovered from the mangrove soil in Kuching, state of Sarawak, Malaysia. Phylogenetic analysis of all the isolates and their closely related type strains using 16S rRNA gene sequences resulted in 7 major clades in the phylogenetic tree reconstructed based on neighbour-joining algorithm. Of the 88 isolates, 18 isolates could be considered as potentially novel species according to the 16S rRNA gene sequence and phylogenetic analyses. Preliminary bioactivity screening conducted on the potential novel Streptomyces isolates revealed significant antioxidant activity and notable cytotoxic effect against tested colon cancer cell lines (HCT-116, HT-29, Caco-2, and SW480), with greater cytotoxicity towards SW480 and HT-29 cells. This study highlighted that the Sarawak mangrove environment is a rich reservoir containing streptomycetes that could produce novel secondary metabolites with antioxidant and cytotoxic activities.

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Section: Discussionmentioning

confidence: 99%

Diversity of Streptomyces spp. from mangrove forest of Sarawak (Malaysia) and screening of their antioxidant and cytotoxic activities

Law

Chan

et al. 2019

Sci Rep

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“…Antibiotic production is one of the most studied biocontrol strategies of rhizobacteria and includes a wide variety of antibiotics (amphisin, 2,4-diacetylphloroglucinol (DAPG), oomycin-A, phenazine, pyroluteorin, pyrrolnitrin, tensin, oligomycin-A, kanosamine, zwittermicin-A, and xanthobaccin) [91] . Some genera of antibiotic-producing rhizobacteria correspond to Burkholderia [92] , Streptomyces [93] , Bacillus, Pseudomonas, and Stenotrophomonas [91] .…”

Section: Antibioticsmentioning

confidence: 99%

Rhizospheric bacteria with potential benefits in agriculture

Velasco-Jiménez,

Castellanos-Hernández,

Acevedo-Hernández

et al. 2022

Advan. Mod. Agr.

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Rhizobacteria are a vast and very diverse group of bacteria that live in the vicinity of roots. They develop beneficial, neutral, and even detrimental relationships, although the latter to a lesser extent. The interactions between bacteria and plant roots have played a determining role in the adaptation and productivity of plant species over time. Several studies show that rhizobacteria have improved plant growth, production, and health, both directly through mechanisms that include the assimilation of vital nutrients such as nitrogen fixation, phosphorus and potassium solubilization, and phytostimulation through the production of various phytohormones) and indirectly (by affecting the growth of important pathogens, activating plant immunity, and improving problems caused by abiotic stress). Due to their metabolic diversity, rhizobacteria could contribute positively to the improvement of agricultural productivity and the solution of environmental problems caused by the methods used in current agriculture. Several genera, such as Acidithiobacillus, Aminobacter, Arthrobacter, Azoarcus, Azospirillum, Azotobacter, Bacillus, Burkholderia, Clostridium, Enterobacter, Gluconoacetobacter, Pseudomonas, Serratia, and Sphingomonas, have demonstrated their enormous growth-promoting capacity. This review provides a focus on the mechanisms by which rhizobacteria enhance plant growth, their contribution to sustainable agriculture, and their commercialization, a field that continues to grow steadily.

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“…In recent years, marine actinomycetes have emerged as a rich source of novel compounds (4). The Streptomyces species isolated from mangrove environment showed divergent in their phylogenetic analysis and possessed good antibacterial and antifungal activities (5). This study therefore isolate and screen for the antimicrobial properties of actinomycetes from marine soil sediments and sponges in an attempt for a new, safe and effective antimicrobial agent.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Screening of Actinomycetes for Antimicrobial Activities from Marine Soil Sediments and Sponges

Kurup¹,

Ram²,

Kumari³

2016

West Indian Med J

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Objective: The aim of this study was to isolate and screen for the antimicrobial properties of actinomycetes from marine soil sediments and sponges. Methods: The samples of sponges and sediments were collected from various locations from the coast of Andhra Pradesh. Isolation of actinomycetes was done by plating them on starch casein agar, kuster's agar, Actinomycete isolation agar and potassium tellurite agar medium using dilution technique. Various pathogenic bacterial strains, fungal strains and yeasts were obtained from Microbial Type Culture

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Molecular Characterization of Antagonistic Streptomyces Isolated from a Mangrove Swamp

Cited by 18 publications

References 6 publications

Diversity of Streptomyces spp. from mangrove forest of Sarawak (Malaysia) and screening of their antioxidant and cytotoxic activities

Diversity of Streptomyces spp. from mangrove forest of Sarawak (Malaysia) and screening of their antioxidant and cytotoxic activities

Rhizospheric bacteria with potential benefits in agriculture

Isolation and Screening of Actinomycetes for Antimicrobial Activities from Marine Soil Sediments and Sponges

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