Composition of the Essential Oil of<i>Ocimum gratissimum</i>Grown in Rwanda<sup>1</sup>

Ntezurubanza, L.; Jj, Scheffer; Ab, Svendsen

doi:10.1055/s-2006-962762

Cited by 38 publications

(5 citation statements)

References 9 publications

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“…This chemical composition was closer to two previously described samples of O. gratissimum from Rwanda by Ntezurubanza et al [26] with 35.42 to 47.85 % in thymol amount and samples of O. gratissimum oils collected in various localities in Benin described by Yayi et al [20] with thymol amount varied from 25.9 to 65.4 %.…”

Section: Chemical Analysissupporting

confidence: 89%

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Koba¹,

Poutouli

Christine

et al. 2008

J. Sci. Res.

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The aerial parts of Ocimum gratissimum L. (Lamiaceae) harvested in Togo was steam-distilled and investigated for essential oil composition (GC and GC/MS) and in vitro antifungal activities. Thymol (31.79 %), p-cymene (15.57 %) and Î³-terpinene (12.34 %) and were the major components of the oil. Other notable components identified in this oil were myrcene (6.94 %) and Î±-thujene (6.11 %).The in vitro antifungal activity was recorded with the minimum inhibitory concentrations (MICs) ranging from 80 to 150Â Âµl.l-1, 150 to 500 Âµl.l-1 Â and from 100 to 150 Âµl.l-1 respectively on dermatophytes, imperfect filamentous fungi and pathogenic yeasts. Likewise, on tested fungi the minimum fungicidal concentration (MFC) varied from 300 Âµl.l-1 to 500 Âµl.l-1, 500 to 700 Âµl.l-1 and from 250 to 300 Âµl.l-1, respectively on dermatophytes, imperfect filamentous fungi and pathogenic yeasts. Keywords: O.gratissimum,Â Antifungal, Essential oil; Thymol.Â Â© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.Â DOI: 10.3329/jsr.v1i1.1131Â

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Section: Chemical Analysissupporting

confidence: 89%

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Koba¹,

Poutouli

Christine

et al. 2008

J. Sci. Res.

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“…Apart from that, the chemical composition of the stress volatiles (essential oils) also varied from conventional methods of Ocimum essential oil preparation. Previous studies indicated a higher quantity of linalyl acetate and linalool in O. basilicum [ 19 ]; O. gratissimum was rich in thymol and eugenol [ 20 ]; O. canum contained thymol, p-cymene and γ-terpinene [ 21 ]; whereas O. tenuiflorum was rich in eugenol followed by β-elemene and β-caryophyllene [ 22 ]. The variation in the volatile-compound composition in this essential oil may be attributed to the ultrasound-assisted mode of extraction.…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial and Larvicidal Activities of Different Ocimum Essential Oils Extracted by Ultrasound-Assisted Hydrodistillation

Sneha¹,

Narayanankutty²,

Job³

et al. 2022

Molecules

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Infectious diseases and their vectors have remained a concern for human population from their historical origin. Microbial pathogens have also emerged as a potent threat to the healthcare systems even in developed countries. Essential oils remain a less explored method for infectious disease control; besides, the ultrasound-assisted extraction (UAE) of essential oil production has emerged as promising source of bioactive volatiles over conventional methods. This study analyzed the possible use of UAE- Essential oils (EOs) from different species of Ocimum plants (Ocimum basilicum (OB), O. gratissimum (OG), O. tenuiflorum (OT), and O. canum (OC)) in the management of microbial pathogens and mosquito larval control. The antibacterial activity was estimated in terms of a disc diffusion assay and minimum inhibitory concentrations against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Salmonella enteritidis. The larvicidal property was found using three important mosquito vectors and the LC50 value was determined. Furthermore, antioxidant and anti-inflammatory properties were estimated in terms of radical scavenging activities and the inhibition of lipoxygenase enzyme activity. The EOs exhibited significant DPPH radical scavenging (high in OG), hydrogen-peroxide scavenging (OB) and lipoxygenase inhibition (OB). The antibacterial activity was high in OB and OG (p < 0.05) and the larvicidal activity was of higher sensitivity against Aedis and Culex, whereas Armigeres was more resistant. However, no sign of toxicity in the Allium cepa model or non-targeted organism Guppy fishes was observed. Overall, the UAE extracted Ocimum essential oils were found to be effective against various human pathogenic microbial organisms, with OB and OG being highly active. Likewise, the EOs was also able to induce mortality in the larval forms of various mosquito vectors.

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“…According to the biosynthetic origins of the major compounds, they were classified as chemotypes with single or dual biosynthetic pathways. Other chemotypes such as eugenol-rich and thymol-rich O. gratissimum (9)(10)(11)(12)(13), sesquiterpenes-rich O. canum (14), and terpinen-4-ol-rich O. canum (15) have been reported. However, there is little available published data on the antioxidant potential of essential oils of the Ocimum species.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Volatile Pattern and Antioxidant Capacity of Essential Oils from Different Species of the Genus Ocimum

Trevisan

Silva

Pfundstein

et al. 2006

J. Agric. Food Chem.

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The antioxidant capacity of essential oils obtained by steam hydrodistillation from five species of the genus Ocimum, namely Ocimum basilicum var. purpurascens, Ocimum basilicum, Ocimum gratissimum, Ocimum micranthum, and Ocimum tenuiflorum (syn. O. sanctum), were evaluated using a high-performance liquid chromatography-based hypoxanthine/xanthine oxidase and the DPPH assays. The yield of oils from the leaves of the five species was variable with the greater amount obtained from Ocimum gratissimum (3.5%) and the least from Ocimum basilicum var. purpurascens (0.5%). In the hypoxanthine/xanthine oxidase assay, strong antioxidant capacity was evident in all the oils but the greater was shown by that obtained from Ocimum tenuiflorum (syn. O. sanctum) (IC50 = 0.46 microL/mL) compared to Ocimum basilicum var. purpurascens (IC50 = 1.84 microL/mL). Antioxidant capacity was positively correlated (r = 0.92, p < 0.05) with a high proportion of compounds possessing a phenolic ring such as eugenol, while a strong negative correlation (r = -0.77, p > 0.1) with other major volatiles was observed. These correlations were confirmed to a large extent in the DPPH assay. The results of a 24 h experiment with Ocimum tenuiflorum (syn. O. sanctum) shows that the antioxidant capacity factor (amount of essential oil obtained x free radical scavenging capacity; mg x %/100) reaches a threshold between 10 and 12.00 h, corresponding to maximum sunlight intensity in Brasil and furthermore exhibits a clear diurnal variation. The data generated with Ocimum species indicates that essential oils obtained from various herbs and spices may have an important role to play in cancer chemoprevention, functional foods, and in the preservation of pharmacologic products.

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Composition of the Essential Oil ofOcimum gratissimumGrown in Rwanda¹

Cited by 38 publications

References 9 publications

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Antimicrobial and Larvicidal Activities of Different Ocimum Essential Oils Extracted by Ultrasound-Assisted Hydrodistillation

Characterization of the Volatile Pattern and Antioxidant Capacity of Essential Oils from Different Species of the Genus Ocimum

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Composition of the Essential Oil ofOcimum gratissimumGrown in Rwanda1

Cited by 38 publications

References 9 publications

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Antifungal Activity of the Essential Oils from Ocimum gratissimum L. Grown in Togo

Antimicrobial and Larvicidal Activities of Different Ocimum Essential Oils Extracted by Ultrasound-Assisted Hydrodistillation

Characterization of the Volatile Pattern and Antioxidant Capacity of Essential Oils from Different Species of the Genus Ocimum

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Composition of the Essential Oil ofOcimum gratissimumGrown in Rwanda¹