Selection gains for essential oil traits using micropropagation of Eucalyptus polybractea

Goodger, Jason Q. D.; Woodrow, Ian E.

doi:10.1016/j.foreco.2008.03.006

Cited by 26 publications

(9 citation statements)

References 24 publications

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“…Gums, oils, and resins are some products of Eucalyptus, which are used as flavoring agents, astringents, and aromatics, and were formerly used to treat diarrhea, asthma, bronchitis, and respiratory tract infections. [14,15] Different extraction compositions could be obtained by different extraction methods applied to natural products. [16] Previous studies showed that the composition of the extract products obtained by various methods could be significantly different.…”

Section: Reactive Oxygen Species (Ros) Containing Superoxide Anion (O •−mentioning

confidence: 99%

Chemical Composition, Antioxidant, and Antibacterial Activities of the Essential Oil and Methanol Extracts ofEucalyptus largiflorensF. Muell

Rahimi‐Nasrabadi

Nazarian

Farahani³

et al. 2013

International Journal of Food Properties

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This study was designed to examine the chemical composition of essential oil and in vitro antioxidant and antimicrobial activity of the essential oil and methanol extracts of Eucalyptus largiflorens F. Muell. The chemical composition of the hydrodistilled essential oil of the leaves of E. largiflorens was analyzed by gas chromatography and gas chromatography/mass spectrometry. The main constituents of the oil were found to be 1,8-cineole (23.1%), cryptone (15.1%), 4-allyloxyimino-2-carene (11.2%), and 4-terpineol (9.6%). The essential oil showed strong antibacterial activity against the studied microorganisms, except for P. aeruginosa, while polar subfraction of methanol extract had moderate antimicrobial activity and the nonpolar subfraction of methanol extract did not show any antimicrobial activity. In contrast, the extract showed better activity than the essential oil in antioxidant activity assays employed, e.g., in a 2,2-diphenyl-1-picryl-hydrazyl system. Also, the polar subfraction of methanol extract (15.1 ± 0.7 µg/ml) showed the highest radical-scavenging activity. In the second case, the inhibition capacity (%) of the nonpolar subfraction (92.7% ± 2.5) was found to be the stronger one. Finally, the total amounts of phenol constituents in the polar subfraction (142.6 ± 0.9 µg/mg), nonpolar subfraction (68.6 ± 0.4 µg/mg), and the oil (36.0 ± 0.6 µg/mg) were determined.

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Section: Reactive Oxygen Species (Ros) Containing Superoxide Anion (O •−mentioning

confidence: 99%

Chemical Composition, Antioxidant, and Antibacterial Activities of the Essential Oil and Methanol Extracts ofEucalyptus largiflorensF. Muell

Rahimi‐Nasrabadi

Nazarian

Farahani³

et al. 2013

International Journal of Food Properties

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“…In recent decades, the essential oils and their components of plants have been of great interest as they have been the sources of natural products [ 6 ]. The value of Eucalyptus oil for medicinal purposes is based largely on the content of a particular oil constituent: 1,8-cineole (cineole or eucalyptol) [ 7 ]. Hot water extracts of dried leaves of Eucalyptus citriodora are traditionally used as analgesic, anti-inflammatory and antipyretic remedies for the symptoms of respiratory infections, such as cold, flu, and sinus congestion ([ 8 ], Eucalyptus camaldulensis and Eucalyptus urophylla are also known to contain bioactive products that showed antibacterial [ 9 ], antifungal [ 10 ], analgesic and anti-inflammatory effects [ 8 ], antioxidative and antiradical [ 11 ] activities.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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BackgroundIn this paper, we have studied the essential oils chemical composition of the leaves of seven Eucalyptus species developed in Tunisia. Eucalyptus leaves were picked from trees growing in different arboretums in Tunisia. Choucha and Mrifeg arboretums located in Sedjnene, region of Bizerte (Choucha: E. maideni, E. astrengens et E. cinerea; Mrifeg : E. leucoxylon), Korbous arboretums located in the region of Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum located in region of Jendouba (E. sideroxylon, E. bicostata). Essential oils were individually tested against a large panel of microorganisms including Staphylococcus aureus (ATCC 6539), Escherichia coli (ATCC 25922), Enterococcus faecalis (ATCC29212), Listeria ivanovii (RBL 30), Bacillus cereus (ATCC11778).ResultsThe yield of essential oils ranged from 1.2% to 3% (w/w) for the different Eucalyptus species. All essential oils contain α-pinene, 1,8-cineol and pinocarveol-trans for all Eucalyptus species studied. The 1,8-cineol was the major compound in all species (49.07 to 83.59%). Diameter of inhibition zone of essential oils of Eucalyptus species varied from 10 to 29 mm. The largest zone of inhibition was obtained for Bacillus cereus (E. astrengens) and the lowest for Staphylococcus aureus (E. cinerea). The essential oils from E. maideni, E. astrengens, E. cinerea (arboretum of Bizerte), E. bicostata (arboretum of Aindraham) showed the highest antibacterial activity against Listeria ivanovii and Bacillus cereus.ConclusionThe major constituents of Eucalyptus leaves essential oils are 1,8-cineol (49.07 to 83.59%) and α-pinene (1.27 to 26.35%). The essential oils from E. maideni, E. astrengens, E. cinerea, E. bicostata showed the highest antibacterial activity against Listeria ivanovii and Bacillus cereus, they may have potential applications in food and pharmaceutical products.

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“…The Australian Tea Tree breeding program has doubled commercial Tea Tree oil yield from 150 to 300 kg ha −1 since 1993 through selection based on a weighted multi-trait index (Baker et al 2014). Estimated gains from one cycle of selection for oil concentration in Eucalyptus species E. camaldulensis (Doran and Matheson 1994) and E. polybractea (Grant 1997) are around 30 %, though Goodger and Woodrow (2008) noted that in practice, trial plantations of E. polybractea often failed to achieve such gains due partly to large variation in open-pollinated half-sibling progeny.…”

Section: Selecting For Essential Oil Yieldmentioning

confidence: 99%

Genomic approaches to selection in outcrossing perennials: focus on essential oil crops

et al. 2015

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The yield of essential oil in commercially harvested perennial species (e.g. 'Oil Mallee' eucalypts, Tea Trees and Hop) is dependent on complex quantitative traits such as foliar oil concentration, biomass and adaptability. These often show large natural variation and some are highly heritable, which has enabled significant gains in oil yield via traditional phenotypic recurrent selection. Analysis of transcript abundance and allelic diversity has revealed that essential oil yield is likely to be controlled by large numbers of quantitative trait loci that range from a few of medium/large effect to many of small effect. Molecular breeding techniques that exploit this information could increase gains per unit time and address complications of traditional breeding such as genetic correlations between key traits and the lower heritability of biomass. Genomic selection (GS) is a technique that uses the information from markers genotyped across the whole genome in order to predict the phenotype of progeny well before they reach maturity, allowing selection at an earlier age. In this review, we investigate the feasibility of genomic selection (GS) for the improvement of essential oil yield. We explore the challenges facing breeders selecting for oil yield, and how GS might deal with them. We then assess the factors that affect the accuracy of genomic estimated breeding values, such as linkage disequilibrium (LD), heritability, relatedness and the genetic architecture of desirable traits. We conclude that GS has the potential to significantly improve the efficiency of selection for essential oil yield.

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Selection gains for essential oil traits using micropropagation of Eucalyptus polybractea

Cited by 26 publications

References 24 publications

Chemical Composition, Antioxidant, and Antibacterial Activities of the Essential Oil and Methanol Extracts ofEucalyptus largiflorensF. Muell

Chemical Composition, Antioxidant, and Antibacterial Activities of the Essential Oil and Methanol Extracts ofEucalyptus largiflorensF. Muell

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

Genomic approaches to selection in outcrossing perennials: focus on essential oil crops

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