Antioxidant and Antibacterial Natural Products Evaluation from Terrestrial Streptomyces Species Strain KAV 2 Isolated from Rhizosphere Regions of Piper betle
Terrestrial actinomycetes have come to antimicrobial production dominantly and have been the focussed area for bioprospecting of novel secondary metabolites. The secondary metabolites of the fermented culture were prepared by solvent extraction method. In the current research work, Streptomyces species were completely analysed for antioxidant and antibacterial activities and also the GCMS analysis of the crude active extract revealed the presence of 12 bioactive compounds, which makes the particular strain as a potent source for drug validation research. The antioxidant activities assessed by four different methods proved that the crude extract could be effective against various kinds of free radicals. The maximum free radical scavenging activity for Ethyl acetate fraction by DPPH method was found to be 94.84±0.24% at 60 µg/mL concentration and the IC50 value was 26.91 µg/mL concentration respectively. The maximum ferric reducing ability for Ethyl acetate fraction was found to be 81.83±0.48% at 120 µg/mL concentration and the RC50 value was 53.16 µg/mL concentration respectively. The qualitative screening for active compounds gave positive results for alkaloids, phenols, tannins, terpenoids, steroids. The Streptomyces species demonstrated antibacterial activities with maximum zone of inhibition as 19 mm against tested bacterial pathogens such as Micrococcus luteus and Bacillus subtilis.
Keywords: Streptomyces, DPPH˙ radical, ABTS●+ radical cation, antibacterial, GCMS
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).