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Extracellular biosynthesis of silver nanoparticles using Streptomyces griseoplanus SAI-25 and its antifungal activity against Macrophomina phaseolina , the charcoal rot pathogen of sorghum

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Relation http://oar.icrisat.org/10507/
http://dx.doi.org/10.1016/j.bcab.2018.03.006
10.1016/j.bcab.2018.03.006
 
Title Extracellular biosynthesis of silver nanoparticles using Streptomyces griseoplanus SAI-25 and its antifungal activity against Macrophomina phaseolina , the charcoal rot pathogen of sorghum
 
Creator Vijayabharathi, R
Sathya, A
Gopalakrishnan, S
 
Subject Pest Management
Sorghum
Plant Pathology
 
Description Streptomyces griseoplanus SAI-25 isolated from rice rhizospheric soils with previously demonstrated insecticidal activity is currently characterized for silver nanoparticle synthesis using its extracellular extract. The synthesized particles showed the characteristic absorption spectra of silver nanoparticles at 413–417 nm. Spectral analysis by FTIR confirmed the presence of alcohols, amines, phenols and protein in the cell-free extracellular extract of SAI-25. These functional groups could have served dual roles in silver nanoparticle synthesis like reducing and stabilizing agents. Microscopic and spectroscopic analysis such as SEM, TEM, EDAX and XRD has provided the size, shape and composition of the synthesized nanoparticles. DLS and Zeta potential further confirms the size and characteristic negative charges of AgNPs respectively. The observed antifungal activity against charcoal rot pathogen Macrophomina phaseolina shows a base for the development of Streptomyces mediated nanoparticles in controlling this polyphagus pathogen and key role of biopesticides in improving agricultural economy.
 
Publisher Elsevier
 
Date 2018-04
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10507/1/Extracellular%20biosynthesis%20of%20silver%20nanoparticles.pdf
Vijayabharathi, R and Sathya, A and Gopalakrishnan, S (2018) Extracellular biosynthesis of silver nanoparticles using Streptomyces griseoplanus SAI-25 and its antifungal activity against Macrophomina phaseolina , the charcoal rot pathogen of sorghum. Biocatalysis and Agricultural Biotechnology, 14. pp. 166-171. ISSN 1878-8181