Abstract
In this study, a total of 158 actinomycetes isolated from 15 soil samples of Kodagu district (Karnataka state) were screened for antimicrobial activities against Gram-positive, Gram-negative bacteria and fungi. A total of 138 (87.34) isolates showed antimicrobial activity against one or more test organisms. Based on the results of preliminary screening, 65(47) isolates showed noticeable antimicrobial activities against test organisms and were selected and identified based on morphological, biochemical and chemotaxonomic characteristics. The potential antibiotic producing actinomycetes identified as Micromonospora spp. (26), Streptomyces spp. (11); Nocardia spp. (9); Actinomadura spp. (7); Rhodococcus spp. (6); Nocardiopsis spp. (4) and Saccharomonospora spp. (2) respectively. This study highlights the occurrence of potential actinomycetes in underexplored habitats of Kodagu region.
Highlights
Among microorganisms, actinomycetes are useful biological tools in the production of diverse range of bioactive secondary metabolites such as antibiotics, anticancer, immunosuppressive agents and enzymes with high economic value [1,2]
Soil is a natural reservoir for actinomycetes and served as sources of antimicrobial products by pharmaceutical industry for about half a century, only a miniscule fraction of actinomycetes have been used in pharmaceutical industry [4]
In view of the above, study was undertaken to identify the diversity of actinomycetes and their antimicrobial properties in soil samples of Kodagu district, Karnataka state, (India)
Summary
Actinomycetes are useful biological tools in the production of diverse range of bioactive secondary metabolites such as antibiotics, anticancer, immunosuppressive agents and enzymes with high economic value [1,2]. Kodagu is a district of Karnataka state in Southern India, located within North latitude 12o19’.45" and East longitude 75o53’.44" which is situated on the eastern slopes of Western Ghats where the range of hills running along Indian’s west coast. Of land in the Western Ghats which is one of the major biogeographical zone of India which has a rich and varied biodiversity In this rich biodiversity hot spot zone, studies have been carried out in Kerala [5] and Tamil Nadu [6] indicating diverse potent strains of actinomycetes with potential antibacterial activity. In view of the above, study was undertaken to identify the diversity of actinomycetes and their antimicrobial properties in soil samples of Kodagu district, Karnataka state, (India)
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