Volatiles from the Rare Australian Desert Plant 'Prostanthera centralis' B.J.Conn (Lamiaceae): Chemical Composition and Antimicrobial Activity

Title
Volatiles from the Rare Australian Desert Plant 'Prostanthera centralis' B.J.Conn (Lamiaceae): Chemical Composition and Antimicrobial Activity
Publication Date
2014
Author(s)
Collins, Tim
Jones, Graham L
( author )
OrcID: https://orcid.org/0000-0002-6435-1542
Email: gjones2@une.edu.au
UNE Id une-id:gjones2
Sadgrove, Nicholas
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
MDPI AG
Place of publication
Switzerland
DOI
10.3390/agriculture4040308
UNE publication id
une:16636
Abstract
Hydrodistilled essential oils and dichloromethane (DCM) extracted volatiles were taken from cultivated specimens of 'Prostanthera centralis', endemic to central Australia. All volatiles were chemically characterised by Gas Chromatography-Mass Spectroscopy (GC-MS) with the use of authentic standards, followed by Nuclear Magnetic Resonance (NMR) Spectroscopy. The antimicrobial activity of the essential oils was measured against a range of Gram-negative and Gram-positive bacterial species using a micro-titre plate broth dilution assay. Twenty-two compounds were identified as components of the sweet smelling aromatic essential oil and DCM extracts, both showing a relatively high abundance of prostantherol. The volatiles extracted using DCM, differed only in the relative abundance of the major components and the lack of ledol and squamulosone. This study constitutes the first time ledol and squamulosone have been identified in a 'Prostanthera' species. Antimicrobial assays showed moderate to high inhibitory activity against some Gram-positive bacteria and the yeast 'Candida albicans'.
Link
Citation
Agriculture, 4(4), p. 308-316
ISSN
2077-0472
Start page
308
End page
316

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