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Title: Antibiofouling activity of marine actinobacterial mediated titanium dioxide nanoparticles
Authors: Veena, S
Swetha, D
Karthik, L
Gaurav, K
Rao, Bhaskara K. V
Keywords: Marine Actinobacteria;Biofouling;Titanium dioxide;Photocatalyst
Issue Date: Apr-2016
Publisher: NISCAIR-CSIR, India
Abstract: Present study is focused on the synthesis of titanium dioxide nanoparticles (TiO2 NPs) from marine actinobacteria and to check their antibiofouling activity against the isolated biofouling bacteria. A total of five actinobacterial strains were isolated from Chennai marine sediments, Tamilnadu, India, which were designated as SV1-SV5. Two biofouling organisms designated as BSV1 and BSV2 were isolated from Chennai port, Tamilnadu India. All the isolated actinobacterial strains (SV1-SV5) showed positive results for the synthesis of TiO2 NPs, which was confirmed by UV analysis. Further characterization of the synthesized TiO2 NPs was done by using Atomic force microscopy (AFM), X-ray diffraction (XRD) and Fourier transform infrared radiation (FTIR). Isolated biofouling bacteria BSV1 and BSV2 were identified as Staphylococcus sp. Antifouling activity of actinobacterial extract and the combination of actinobacterial extract and TiO2 nanoparticle were tested by using agar well diffusion method. Maximum zone of inhibition was shown by SV2 (15 mm) and SV3 (18 mm) with TiO2 synthesized supernatant against biofouling bacteria. Potential actinobacterial strain SV2 and SV3 were identified as Streptomyces sp. These results shows marine actinobacteria can be used as a potential source for obtaining novel secondary metabolites with important ecological role, including preventing from fouling organisms.
Page(s): 583-590
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.45(04) [April 2016]

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