Chemical composition, antifungal and antioxidant properties of seasonal variation in Eucalyptus tereticornis leaves of essential oil

The study aims to evaluate the chemical composition and anti-microbial activities of essential oils (EOs) extracted from fresh and shed dried leaves of Eucalyptus tereticornis clone C-83 during three consecutive seasons - winter, summer and rainy to determine the best harvesting time for obtaining t...

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Bibliographic Details
Published in:Industrial crops and products 2024-12, Vol.222, p.119669, Article 119669
Main Authors: Khaiper, Mamta, Poonia, Pawan Kumar, Redhu, Ishu, Verma, Preety, Sheokand, R.N., Nasir, Mohammed, Tiwari, Anjali, Kumar, Vikas
Format: Article
Language:English
Subjects:
antioxidant activity
Antioxidant activity and antifungal properties
antioxidants
camphene
carene
chemical composition
cineole
drugs
Essential oil
essential oils
Eucalyptus tereticornis
Fusarium
gas chromatography
leaves
Macrophomina phaseolina
Magnaporthe grisea
oils
Seasonal variation
spectroscopy
summer
Thanatephorus cucumeris
winter
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Summary:The study aims to evaluate the chemical composition and anti-microbial activities of essential oils (EOs) extracted from fresh and shed dried leaves of Eucalyptus tereticornis clone C-83 during three consecutive seasons - winter, summer and rainy to determine the best harvesting time for obtaining the highest essential oil yield. The chemical composition was analyzed using a Gas Chromatography–Mass Spectrophotometry (GC-MS) and major compounds in fresh leaves oil were Eucalyptol (54.88 %), Camphene (30.40 %), α-Eudesmol (22.44 %) and 3-Carene (19.50 %). Dry leaf oil predominantly comprised Isopulegol (53.53 %), 3-Isopropenyl-6-methyl-1-cyclohexene (17.29 %) and Cis-Sabinene hydrate (13.55 %). Isoterpinolene held a substantial presence at 5.61 %, while Guaiol notably contributed at 2.49 %. 2-isopropyl-4-methyl-2,5-dihydrooxazole registered at 2.32 %, indicating its significant presence in the analyzed composition. Additionally, Bicyclogermacrene and Bicyclo[5.2.0]nonane, 2-methylene-4,8,8-trimethyl-4-vinyl-, exhibited noticeable percentages at 1.43 % and 1.32 %, respectively, underscoring their relative abundance within the sample. It revealed a concentration dependent rise in antioxidant effectiveness, with summer consistently exhibiting the highest radical scavenging potential of 93.58 % at 4 % concentration. Additionally, the oil showed antifungal properties against four plant-damaging fungi- Magnaporthe grisea, Rhizoctonia solani, Rhizoctonia bataticola and Fusarium oxysporum- signifying potent antifungal properties in eucalyptus oils. The radical scavenging activity with increasing concentration across all seasons, showcasing higher efficacy as the concentration of essential oil rises, with the summer season consistently displaying the highest antioxidant potential across all concentrations. The study enhances comprehension of EOs and offers a pharmacological analysis, potentially advancing its exploration as a functional drug in agricultural and cosmetic sectors. [Display omitted] •The chemical composition of essential oils of Eucalyptus leaves (clone C-83) was analyzed using a GC-MS and major compounds in fresh leaves oil were Eucalyptol, Camphene and α-Eudesmol whereas dry leaf oil predominantly comprised Isopulegol, 3-Isopropenyl-6-methyl-1-cyclohexene and Cis-Sabinene hydrate.•Bicyclogermacrene and Bicyclo[5.2.0]nonane, 2-methylene-4,8,8-trimethyl-4-vinyl-, exhibited noticeable percentages at 1.43 % and 1.32 %, respectively, underscoring their rel
ISSN:0926-6690
DOI:10.1016/j.indcrop.2024.119669