M. H. Morshed
Department of Chemistry, Khulna University of Engineering and Technology, Khulna-9203, Bangladesh
M. Shamim Hossain
Microbiology and Biotechnology Laboratory, Department of Pharmacy, Rajshahi University,
M. Ibrahim
Microbiology and Biotechnology Laboratory, Department of Pharmacy, Rajshahi University,
M.Z. Shafique
Microbiology and Biotechnology Laboratory, Department of Pharmacy, Rajshahi University,
M.O.H. Helali
Microbiology and Biotechnology Laboratory, Department of Pharmacy, Rajshahi University,
A. Samad
Microbiology and Biotechnology Laboratory, Department of Pharmacy, Rajshahi University,
M.S. Islam
BARI, Fruit Research Station, Rajshahi-6206, Bangladesh
M.A. Islam
Department of Chemistry, Rajshahi University, Rajshahi-6205, Bangladesh
ABSTRACT
The aim of the present study was to evaluate the antibacterial characteristic of the four synthetic plant hormones Indoleacetic acid (IAA), 2,4- dichlorophenoxyacetic acid (2,4-D), Naphthaleneacetic acid (NAA) and Gibberellic acid (GA). Antibacterial potency was assessed by measuring the zone of inhibitions on semi-solid nutrient agar bacterial inoculating petri dishes. NAA and IAA gave potent antibacterial activity at concentration of 150 μg disc-1 giving zones at 26-35 mm. Bacteriostatic and bactericidal concentrations against the pathogens were determined by serial dilution technique. Bacteriocidal concentrations of the tested principles were found to be significantly higher than their respective bacteriostatic concentrations. Minimum inhibitory concentrations that are bacteriostatic concentrations of the tested compounds were found at 32-128 μg mL-1 whereas, bactericidal concentrations established at 256-512 μg mL-1 against eight pathogenic bacteria Streptococcus -haemolyticus, Staphylococcus aureus, Pseudomonas aeroginosa, Shigella dysenteriae, Shigella flexneri, E. coli, Salmonella typhi and Klebsiella pneumoniae.
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How to cite this article
M. H. Morshed, M. Shamim Hossain, M. Ibrahim, M.Z. Shafique, M.O.H. Helali, A. Samad, M.S. Islam and M.A. Islam, 2005. Bacteria Killing Kinetics of the Four Plant Hormones. Pakistan Journal of Biological Sciences, 8: 1025-1029.
DOI: 10.3923/pjbs.2005.1025.1029
URL: https://scialert.net/abstract/?doi=pjbs.2005.1025.1029
DOI: 10.3923/pjbs.2005.1025.1029
URL: https://scialert.net/abstract/?doi=pjbs.2005.1025.1029
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