The present study was investigated to synthesis the iron nanoparticles (FeNPs) using the leaf extract of
Phyllanthus reticulatus
. The phytosynthesized FeNPs exhibited UV–visible absorption peaks at 229 nm and its crystalline nature was confirmed through XRD. FT-IR analysis revealed the presence of various functional groups which are responsible for the bioreduction of FeNPs. The SEM results showed that FeNPs were aggregated, irregular sphere shaped with rough surfaces and EDX spectrum recorded densely occupied iron nanoparticles region. The particle size range of the synthesized iron nanoparticles was 185.6 nm. The FeNPs showed potential methylene blue decolourisation activity which was visually observed by gradual colour change in the dye solution from deep blue to colorless. The control exhibited no change in coloration during exposure to sunlight and the iron nanoparticles completely disintegrated the methylene blue within 10 s in 10 mg/L methylene blue (98%), whereas the color change was decreased when the concentration of the dye increased. In addition, the phyto-synthesized FeNPs exhibited extensive antibacterial and antifungal activity against the selected pathogens. Phytotoxicity assay confirms the potential of biosynthesized iron nanoparticles as a fertilizer for the growth of green gram seeds. Thus the present study leads to development of cost-effective green synthesis, reduction of toxic chemicals and its extensive applications in the biological sciences.
Pseudomonas aeruginosa strain SW1 is an aerobic, motile, Gram-negative, and rod-shaped bacterium isolated from degraded seaweeds. Based on the 16S rDNA sequence and MALDI TOF analysis, the strain SW1 exhibits 100% similarity with P. aeruginosa DSM 50071, its closest phylogenetic neighbour. P. aeruginosa is an opportunistic pathogen that can infect plants, animals and humans. The complete genome of P. aeruginosa strain SW1 consists of a single circular chromosome with 23,258,857 bp (G+C content of 66%), including 6734 coding DNA sequences, 8 rRNA, and 63 tRNA sequences. The genome of the P. aeruginosa SW1 contains genes for biosynthesis of alginate (AlgA.
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