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Unusual antimicrobial compounds from Aeollanthus buchnerianus
J E Dellar1, M D Cole, P G Waterman
1Phytochemistry Research Laboratories, Department of Pharmaceutical Sciences, University of Strathclyde, Glasgow, Scotland.
Experientia
|February 15, 1996
Summary
Novel compounds from Aeollanthus buchnerianus show potent antimicrobial and antifungal activities. These natural products offer potential for developing new treatments against plant pathogens and bacteria.
Area of Science:
- Phytochemistry
- Natural Product Chemistry
- Microbiology
Background:
- Aeollanthus buchnerianus (Lamiaceae) is a plant species with potential medicinal properties.
- Natural products are a rich source of bioactive compounds with antimicrobial and antifungal activities.
Purpose of the Study:
- To isolate and identify novel chemical constituents from Aeollanthus buchnerianus.
- To evaluate the antimicrobial and antifungal potential of the isolated compounds.
Main Methods:
- Bioassay-guided isolation techniques were employed to isolate compounds.
- Rigorous spectroscopic methods (e.g., NMR, Mass Spectrometry) were used for structural elucidation.
- Antimicrobial and antifungal activities were assessed using standard bioassays (e.g., Minimum Inhibitory Dose, Minimum Inhibitory Concentration).
Main Results:
- Three novel 12-carbon polyoxygenated fatty acids and one novel abietane diterpene were isolated.
- (Z,Z)-8zeta-acetoxy-5zeta-hydroxydodeca-2,6-dienoic acid and (Z,Z)-5zeta, 8zeta-dihydroxydodeca-2,6-dienoic acid demonstrated significant inhibition against Cladosporium cucumerinum and Aspergillus niger spore germination.
- These fatty acids also reduced the hyphal growth of Pythium ultimum.
- (rel)-14alpha-acetoxyabiet-7-en-18-oic acid exhibited inhibitory effects against Gram-positive bacteria, including Bacillus subtilis, Staphylococcus aureus, and Streptomyces scabies.
Conclusions:
- The isolated novel compounds from Aeollanthus buchnerianus possess significant antifungal and antibacterial properties.
- These findings highlight the potential of Aeollanthus buchnerianus as a source for developing new natural-based agents for controlling plant diseases and bacterial infections.