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    Pharmacognosy Communications
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    Pharmacognosy Communications
    retyeyutreu
    Research Letter

    Antibacterial activity of selected australian syzygium species

    wadmin2By wadmin2December 2, 2013Updated:August 10, 2021No Comments2 Mins Read
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    Chikowe Ga, Mpala La and Cock IEa,b*
    aBiomolecular and Physical Sciences, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, Brisbane, Queensland 4111, Australia.
    bEnvironmental Futures Centre, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, Brisbane, Queensland 4111, Australia.

    Pharmacognosy Communications,2013,3,4,77-83.
    DOI:10.5530/pc.2013.4.11
    Published:December 2013
    Type:Research Letter

    ABSTRACT

    Introduction: Many species of Syzygium are known to have antiseptic activity. Australian Syzygium species had roles as traditional bush medicines for Australian Aborigines although their antiseptic potential has not been rigorously studied. Methods: Methanol extracts of leaves from Syzygium forte, Syzygium francissi, Syzygium moorei, Syzygium puberulum and Syzygium wilsonii were tested for antimicrobial activity by disc diffusion assay. Antibacterial strength was measured by MIC determination. Toxicity was determined using the Artemia franciscana nauplii bioassay. Results: S. forte, S. francissi, S. moorei, S. puberulum and S. wilsonii leaf methanolic extracts inhibited the growth of 5 (36%), 3 (21%), 3 (21%), 5 (36%) and 2 (14%) of the 14 bacteria tested respectively. Both Gram-positive and Gramnegative bacterial growth was inhibited by the Syzygium extracts, although Gram-positive bacteria appeared slightly more susceptible. With the exception of S. forte, all Syzygium leaf extracts tested also displayed low toxicity (LC50 > 1000 μg/ml) in the Artemia fransiscana bioassay. S. forte had a 48 h LC50 of 392.4 ± 33.0 μg/ml, making it slightly more toxic than Mevinphos (495.0 ± 35.1 μg/ml) and approximately 28 fold less toxic than potassium dichromate (14.0 ± 2.4 μg/ml) at 48 h. Conclusions: The antibacterial activity and low toxicity of the Syzygium spp. validate their medicinal usage by Australian Aborigines and indicate their potential as antibacterial medicinal agents.

    Keywords: Syzygium forte, Syzygium francissi, Syzygium moorei, Syzygium puberulum, Syzygium wilsonii, Australian plants, medicinal plants, antibacterial.

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    About Journal

    Pharmacognosy Communications [Phcog Commn.] is a quarterly journal published by Phcog.Net. It is a peer reviewed journal aiming to publish high quality original research articles, methods, techniques and evaluation reports, critical reviews, short communications, commentaries and editorials of all aspects of medicinal plant research. The journal is aimed at a broad readership, publishing articles on all aspects of pharmacognosy, and related fields. The journal aims to increase understanding of pharmacognosy as well as to direct and foster further research through the dissemination of scientific information by the publication of manuscripts. The submission of original contributions in all areas of pharmacognosy are welcome.
    Indexed and Abstracted in : Chemical Abstracts, Excerpta Medica / EMBASE, Google Scholar, CABI Full Text, Ulrich’s International Periodical Directory, ProQuest, Journalseek & Genamics, PhcogBase, EBSCOHost, Academic Search Complete, Open J-Gate, SciACCESS.
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