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Antibacterial and Antifungal Activity of Paddy-Fields Cyanobacteria from the Poondi Village, Thanjavur, Tamil Nadu
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| Author:
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UPLOADED BY-ADMIN, J. SURESH KUMAR , S. SRIDHAR
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| Abstract:
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The three cyanobacterial species were isolated from Paddy-fields in the Poondi village, Thanjavur Dt., Tamil Nadu, India
and cultured in BG11 media. Based on their growth characteristic, three species namely Oscillatoria laete-virens (Gronan)
Gomont. Nostoc calcicola and Phormodium tenue were selected for antifungal and antibacterial assay against the pathogenic
bacteria such as Citrobacter divergens, Escherichia coli (MTCC 3221), Klebsiella pneumoniae (MTCC 3384),
Staphylococcus aurues (MTCC 3160) and Serratia marcescens (MTCC 3124) and the pathogenic fungus such as Aspergillus
flavus (MTCC 1973), Aspergillus fumigatus (MTCC 3002), Aspergillus niger (MTCC 1344), Candida albicans (MTCC
3017), Rhizobus sp. The experiments for the inhibition activity on pathogenic bacterial and fungal strains were carried out at
different concentration levels (25, 50 and 100 mg) of crude extract of three species of Cyanobacteria. Among the three
cyanobacterial species extracts, Phormodium tenue showed the maximum inhibition (62 mm) against Serratia marcescens
compared to other species whereas, the maximum antifungal activity (44 mm) was recorded in Phormodium tenue against
Aspergillus flavus.
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| Keyword:
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cyanobacteria, antifungal, antibacterial, ethanol extract, aqueous extract and chloroform extract
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