Étude botanique, tri phytochimique et évaluation de l’activité antifongique de l’extrait éthanolique des feuilles de &lt;i&gt;Eclipta prostrata&lt;/i&gt; (L.) L. (Asteraceae) sur la croissance &lt;i&gt;in vitro&lt;/i&gt; de trois souches fongiques

Yapi, Adon Basile; Camara, Djeneb; Coulibaly, Kalifa; Zirihi, Guédé Noël

doi:10.4314/jab.v125i1.7

Cited by 3 publications

(1 citation statement)

References 6 publications

(6 reference statements)

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“…The leaves of A. conyzoides, growing in the Masako Forest Reserve (0°36'N; 25°13'E), were collected from May to June, dried for three weeks at room temperature (25 to 30°C), crushed and sifted. The powder was used for the identification of sterols and terpenes before the extraction of essential oil [36].…”

Section: Plant Materialsmentioning

confidence: 99%

Chemical Composition of Essential Oil of Ageratum conyzoides with Antifungal Activity on the Lasiodiplodia theobromae Strain in the Region of Kisangani and DR Congo

Kwembe

Onautshu

Mpiana

et al. 2021

ACRI

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Aims: To determine the chemical composition of essential oil of Ageratum conyzoides with antifungal activity on the strain of Lasiodiplodia theobromae in the Kisangani region. Location and Duration of Studies: Faculty of Sciences of University of Kisangani (Democratic Republic of Congo) and Faculty of Biosciences Engineering of University of Ghent (Belgium), between May to November 2019. Methodology: The essential oil from the leaves of A. conyzoides was extracted by hydrodistillation. Potato dextrose agar (PDA) was used as a culture medium. In vitro evaluation of its antifungal activity was performed on PDA medium and expressed as percentage of inhibition (PI). Results: The extracted essential oil (with a yield of 0.63%) showed a PI of 91.63% on the strain of L. theobromae after two days of incubation. It consists of at least 23 compounds, of which seven are in the majority (abundances greater than 1.5% and represent 92.05%), namely Precocene I (38.33%), Beta-caryophyllene (26.51%), Beta-sesquiphellandrene (8.63%), Beta-cubebene (7.91%), Alpha-muurolene (4.95%), 1.5.9.9-Tetramethyl-1.4.7-cycloundecatriene (3.04%), Cis-beta-farnesene (2.99%). The hydrocarbon sesquiterpenes are the most frequent compounds (58.95%). Discussion: Compared to the A. conyzoides saponins the PI obtained from the essential oil is higher. The essential oil chemotype obtained from the leaves of A. conyzoides is of the Precocene I type, similar to the oils from the stems and flowers of the same plant in West Africa. Conclusion: The essential oil of A. conyzoides has a very high inhibitory power on L. theobromae. It mainly contains the Precocene and the hydrocarbon sesquiterpenes. Assessment of the antifungal activity of each separate molecule should be considered.

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Section: Plant Materialsmentioning

confidence: 99%

Chemical Composition of Essential Oil of Ageratum conyzoides with Antifungal Activity on the Lasiodiplodia theobromae Strain in the Region of Kisangani and DR Congo

Kwembe

Onautshu

Mpiana

et al. 2021

ACRI

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Étude des caractéristiques physicochimiques et de l’activité antifongique des huiles essentielles d’Erigeron floribundus (Kunth.) Sch. Bip

Tia¹,

Adima²,

Menut³

2021

Phytothérapie

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L’usage des plantes médicinales connaît un regain d’intérêt. Cela est lié à la toxicité des produits chimiques, au coût élevé des médicaments chimiques, à l’éloignement et/ou l’insuffisance des centres de santé surtout en milieu rural. L’objectif général de cette étude était d’évaluer les potentialités thérapeutiques de l’huile essentielle des feuilles de l’espèce Erigeron floribundus utilisées en médecine traditionnelle en Côte-d’Ivoire. Les rendements en huile essentielle des feuilles d’Erigeron floribundus varient de 0,16 % pour les feuilles fraîches et de 0,31 % pour les feuilles séchées. Les indices physiques et chimiques de ces huiles essentielles sont en adéquation avec les critères de qualité des huiles essentielles selon la norme Afnor. L’effet antifongique des deux types d’huiles essentielles a été très remarquable sur les souches fongiques testées, notamment Trichophyton mentagrophytes et Aspergillus fumigatus, avec un effet moindre sur Candida albicans. Cette étude valide ainsi scientifiquement les usages traditionnels des extraits de la plante Erigeron floribundus en médecine traditionnelle.

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Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

Kwembe

Mbula

Onautshu

et al. 2020

IJPR

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Aims: To extract, identify and evaluate in vitro the antifungal activity of the phytochemical groups of Ageratum conyzoides and Newbouldia laevis on the strain of Lasiodiplodia theobromae. Study Design: Exploitation of medicinal plants to combat the growth of L. theobromae, responsible for the decline of cocoa cultivation. Location and Duration of Studies: Faculty of Sciences, University of Kisangani, between April 2017 and February 2018. Methodology: The crude extracts of the dry leaves of A. conyzoides and N. laevis were tested (at 100 mg/mL). Potato dextrose agar was used as the culture medium. After chemical screening, abundant phytochemical groups were isolated and tested. Results: The aqueous, 95% ethanolic and ethereal crude extracts of A. conyzoides are more antifungal (respective percentages of inhibition PI: 80.74; 84.10 and 85.64%) than those of N. laevis (63.28; 72.64 and 75.23%). The minimum inhibitory concentration (MIC) of the aqueous crude extract of A. conyzoides is lower (25 mg/mL) than that of the ethanolic extract (50 mg/mL). Tannins are very abundant in A. conyzoides and in N. laevis. Saponins, sterols and terpenes are abundant in both plants. The extraction yields of tannins and saponins are respectively 20.67 and 2.43% in A. conyzoides and 10.47 and 2.38% in N. laevis. A. conyzoides contains the gallic tannins while N. laevis, the condensates and catechics. The saponins and tannins of A. conyzoides are more antifungal (respective PI: 84.40 and 54.44%) than those of N. laevis (PI: 75.56 and 32.96%). Discussion: The saponins of A. conyzoides and N. laevis are more active on the strain of L. theobromae than the tannins. Saponins are surfactants that can destabilize membrane structure of microorganisms including fungi. Conclusion: The saponins of the two plants have shown a very interesting antifungal power on the strain of L. theobromae. The identification of their active molecules is ongoing.

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Étude botanique, tri phytochimique et évaluation de l’activité antifongique de l’extrait éthanolique des feuilles de <i>Eclipta prostrata</i> (L.) L. (Asteraceae) sur la croissance <i>in vitro</i> de trois souches fongiques

Cited by 3 publications

References 6 publications

Chemical Composition of Essential Oil of Ageratum conyzoides with Antifungal Activity on the Lasiodiplodia theobromae Strain in the Region of Kisangani and DR Congo

Chemical Composition of Essential Oil of Ageratum conyzoides with Antifungal Activity on the Lasiodiplodia theobromae Strain in the Region of Kisangani and DR Congo

Étude des caractéristiques physicochimiques et de l’activité antifongique des huiles essentielles d’Erigeron floribundus (Kunth.) Sch. Bip

Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

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