• Ravikant Singh
• Saket Jha
• Anand Pandey
• Anupam Dikshit
• Rohit K. Mishra

The present investigations were focused on the comparision of biological activities of the essential oils of the three gymnospermous foliages i.e., Juniperus communis L., Pinus roxburghii Sarg. and Taxodium distichum L., against Klebsiella pneumoniea (MTCC-4032). The oils were extracted from the leaves of aforementioned plant species using hydro-distillation method. The antibacterial activity of the extracted essential oils was evaluated against Klebsiella pneumoniea (MTCC-4032) using broth micro-dilution method recommended by Clinical Laboratory Standards Institute (CLSI). The Inhibition Concentration i.e. IC50 and Minimum Inhibition concentrations (MIC) using SpectramaxPlus384 Molecular Devices were recorded. Streptomycin as standard was taken. The IC50 value of J. communis, P. roxburghii, and T. distichum were shown to be 0.051, 0.782 and 0.295 mg/ml respectively. The J. communis was found to be most effective with their MIC 0.117 mg/ml while P. roxburghii found to be least effective with their MIC 1.691 mg/ml against K. pneumoniea. Hence, essential oils of aforementioned gymnosperms exhibit great potential for the development of eco-friendly, non-toxic, cost effective, anti-bacterial formulations.

Gymnosperms, Essential oil, Antibacterial activity, Broth Micro-dilution etc.

"¬¬Comparison of Antibacterial Activities of essential oils of Juniperus communis L., Pinus roxburghii Sarg. and Taxodium distichum L. against Klebsiella pneumoniea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.661-669, August-2018, Available :http://www.jetir.org/papers/JETIR1808400.pdf

"¬¬Comparison of Antibacterial Activities of essential oils of Juniperus communis L., Pinus roxburghii Sarg. and Taxodium distichum L. against Klebsiella pneumoniea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp661-669, August-2018, Available at : http://www.jetir.org/papers/JETIR1808400.pdf