Biogenic Emission and Essential Oils of Some Eucalyptus Species: A Comparison Study

2009 ◽  
pp. 357-365 ◽  
Author(s):  
Yazid Foudil-Cherif ◽  
Noureddine Yassaa ◽  
Brahim Y. Meklati
Keyword(s):  
Essential Oils ◽  
Eucalyptus Species ◽  
Comparison Study ◽  
Biogenic Emission

scholarly journals Antimicrobial Activity of Several Cineole-Rich Western Australian Eucalyptus Essential Oils

2018 ◽  
Vol 6 (4) ◽  
pp. 122 ◽  
Author(s):  
Fahad Aldoghaim ◽  
Gavin Flematti ◽  
Katherine Hammer
Keyword(s):  
Mass Spectrometry ◽  
Antimicrobial Activity ◽  
Essential Oils ◽  
Eucalyptus Globulus ◽  
Antimicrobial Agents ◽  
Gas Chromatography Mass Spectrometry ◽  
Eucalyptus Species ◽  
Broth Microdilution ◽  
Main Component ◽  
Western Australian

Essential oils from the Western Australian (WA) Eucalyptus mallee species Eucalyptus loxophleba, Eucalyptus polybractea, and Eucalyptus kochii subsp. plenissima and subsp. borealis were hydrodistilled from the leaves and then analysed by gas chromatography–mass spectrometry in addition to a commercial Eucalyptus globulus oil and 1,8-cineole. The main component of all oils was 1,8-cineole at 97.32% for E. kochii subsp. borealis, 96.55% for E. kochii subsp. plenissima, 82.95% for E. polybractea, 78.78% for E. loxophleba 2, 77.02% for E. globulus, and 66.93% for E. loxophleba 1. The Eucalyptus oils exhibited variable antimicrobial activity determined by broth microdilution, with E. globulus and E. polybractea oils showing the highest activities. The majority of microorganisms were inhibited or killed at concentrations ranging from 0.25% to 8.0% (v/v). Enterococcus faecalis and Candida albicans were the least susceptible organisms, whilst Acinetobacter baumannii was the most sensitive. In conclusion, all oils from WA Eucalyptus species showed microorganism inhibitory activity, although this varied according to both the Eucalyptus species and the microorganism tested. These data demonstrate that WA Eucalyptus oils show activity against a range of medically important pathogens and therefore have potential as antimicrobial agents.

scholarly journals Chemical composition and antibacterial activities of seven Eucalyptus species essential oils leaves

2015 ◽  
Vol 48 (1) ◽  
pp. 7 ◽  
Author(s):  
Khaled Sebei ◽  
Fawzi Sakouhi ◽  
Wahid Herchi ◽  
Mohamed Khouja ◽  
Sadok Boukhchina
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antibacterial Activities ◽  
Eucalyptus Species

The Expression of Distinctive Secondary Metabolites by Different Eucalyptus spp

1992 ◽  
Vol 45 (11) ◽  
pp. 1919
Author(s):  
RM Carman
Keyword(s):  
Secondary Metabolites ◽  
Essential Oils ◽  
Secondary Metabolite ◽  
Eucalyptus Species ◽  
Metabolite Level

A survey of the essential oils of various Eucalyptus species shows that there are sufficient compounds present to support the expectation that differences between species will be expressed or accompanied at the secondary metabolite level by different chemicals, rather than by a different mix of similar chemicals.

scholarly journals Chemical Composition and in-Vitro Evaluation of the Antimicrobial and Antioxidant Activities of Essential Oils Extracted from Seven Eucalyptus Species

Molecules ◽  
2015 ◽  
Vol 20 (11) ◽  
pp. 20487-20498 ◽  
Author(s):  
Abdul Ghaffar ◽  
Muhammad Yameen ◽  
Shumaila Kiran ◽  
Shagufta Kamal ◽  
Fatima Jalal ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Activities ◽  
Eucalyptus Species ◽  
In Vitro Evaluation

Chemical Characterization of the Essential Oils of Eucalyptus.grandis×Eucalyptus.urophylla Hybrids and Six Pure Eucalyptus species Grown in Guangxi (China)

2014 ◽  
Vol 1033-1034 ◽  
pp. 200-208
Author(s):  
Feng Lai Lu ◽  
Yue Yuan Chen ◽  
Jiao Hong Wei ◽  
Yong Lin Huang ◽  
Dian Peng Li ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Characterization ◽  
Hierarchical Cluster ◽  
The Other ◽  
Eucalyptus Species ◽  
Oil Composition ◽  
Pure Species ◽  
Species Analysis ◽  
Total Oil

Hydrodistillation of the fresh leaves of E.grandis×E.urophylla hybrids and pure species E.grandis, E.urophylla, E.pellita, E.camaldulensis, E. dunni, and E.saligna collected from the trees grown in Guangxi Huangmian Forest (China), afforded essential oils in yields varying from 0.24±0.15% to 5.36±0.28%, according to the species. Analysis by GC (FID) and GC/MS allowed the identification of 67 compounds, representing 82.55% to 91.03% of the total oil composition. The dominant compounds were 1,8-cineole in E.saligna, E.urophylla, E.grandis×E.urophylla, E.grandis, E.pellita and E. dunni (67.48, 57.12, 48.21, 23.64, 20.34, 20.22%), p-Cymene in E.camaldulensis,E. dunni and E.grandis(21.32, 14.74, 13.38%), α-pinene in E.grandis and E.grandis×E.urophylla (21.77, 15.55%), α-terpinene in E. dunni and E.grandis (17.96, 9.35%), α-terpineol in E.pellita and E.saligna (19.24,11.54%), respectively. Hierarchical Cluster Analysis separated the characterized essential oils into two groups, each constituting a chemotype. E.grandis×E.urophylla and E.urophylla were classified in the same group, while E.grandis in the other.

scholarly journals Chemical characterization and determination of in vivo and in vitro antifungal activity of essential oils from four Eucalyptus species against the Hemileia vastatrix Berk and Br fungus, the agent of coffee leaf rust

2020 ◽  
pp. 1379-1384
Author(s):  
Alex Rodrigues Silva Caetano ◽  
Sara Maria Chalfoun ◽  
Mario Lúcio Vilela Resende ◽  
Caroline Lima Angélico ◽  
Wilder Douglas Santiago ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Antifungal Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Chemical Characterization ◽  
Eucalyptus Species ◽  
Hemileia Vastatrix ◽  
Antifungal Activities

Essential oils, also known as volatile oils, are substances produced through the secondary metabolism of plants. In this study, we determined the chemical composition and the in vitro and in vivo antifungal activity of the essential oils from four species of Eucalyptus, Eucalyptus citriodora, Eucalyptus camaldulensis, Eucalyptus grandis and Eucalyptus microcorys, against the Hemileia vastatrix fungus. The essential oils from these four species of Eucalyptus were extracted from their leaves by the hydrodistillation technique using a modified Clevenger apparatus. The chemical characterization was performed by gas chromatography coupled with a mass spectrometer detector and by gas chromatography using a flame ionization detector. The antifungal activities of the essential oils against H. vastatrix were studied by evaluating the percentage of spore germination using the microdilution test for in vitro assays. The curative and preventive effects were evaluated in in vivo tests. The principal constituents of the essential oil from E. citriodora were citronellal, citronellol and isopulegol, while E. camaldulensis produced 1,8-cineole, α-terpineol and α-pinene. 1,8-cineole, α-pinene and α-terpineol were obtained from E. grandis and 1,8-cineole, α-pinene and trans-pinocarveol were the principal components in the essential oil of E. microcorys. In vitro and in vivo antifungal activities against the fungus under study were observed for most of the essential oils, except the essential oil from E. microcorys, for which no preventive antifungal activity was observed. Only the curing of infection by the H. vastatrix fungus was observed with this oil.

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