Comparative effects of some extraction solvents on the antimicrobial activity of <i>Eucalyptus camaldulensis</i> leaf, bud, capsule and seed crude extracts

Nasr, Alyaa; Zhou, Xinxin; Huang, Shiping; Wang, Yuan; Li, Xiaoning; Zhu, Guoping

doi:10.1080/14786419.2018.1455049

Cited by 19 publications

(8 citation statements)

References 20 publications

(4 reference statements)

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“…A study on the comparative effects of some extraction solvents on the antimicrobial activity of Eucalyptus camaldulensis revealed that both the type and concentration of the solvent greatly affected the antimicrobial properties of the plant [58]. It was reported that the 30% acetone extract of Eucalyptus camaldulensis showed the highest inhibition of Acinetobacter baumanni [58]. This trend was also observed when the acetone extracts of Acanthus polystachyus and Keetia gueinzii were tested against the gram-positive Bacillus cereus pathogen.…”

Section: Discussionmentioning

confidence: 95%

“…In the present study, acetone extracts had the highest total phenolic, total flavonoid, and tannin content. A study on the comparative effects of some extraction solvents on the antimicrobial activity of Eucalyptus camaldulensis revealed that both the type and concentration of the solvent greatly affected the antimicrobial properties of the plant [58]. It was reported that the 30% acetone extract of Eucalyptus camaldulensis showed the highest inhibition of Acinetobacter baumanni [58].…”

Section: Discussionmentioning

confidence: 99%

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Qualitative and quantitative phytochemical composition, antimicrobial activity, and brine shrimp cytotoxicity of different solvent extracts of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans

et al. 2021

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Background The root, root bark, and root tubers of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans are used for managing bacterial and fungal infections among the Luo community of Kisumu East Sub County in Kenya. However, data on the efficacy of these plants against common bacterial and fungal pathogens is not available. The safety of these plants is also not known. This study aimed to investigate the phytochemical composition, antimicrobial properties, and safety of different solvent extracts of the roots, root barks, and root tubers of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans. The broth microdilution method evaluated the antimicrobial activities of the root, root bark, and root tuber extracts (water, acetone, and methanol) of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans. Gram-positive (Bacillus cereus, Staphylococcus aureus), gram-negative (Escherichia coli), and fungal (Candida albicans) microorganisms were used in the evaluation. The safety of the extracts was evaluated in Artemia salina. The phytochemical composition of the extracts was determined using qualitative and quantitative assays. Results In general, the extracts of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans displayed poor antimicrobial properties relative to conventional antimicrobial agents including Amoxicillin, Gentamicin, and Nystatin. The aqueous extract of Acanthus polystachyus and the aqueous, acetone, and methanol extracts of Keetia gueinzii were safe in Artemia salina but all other extracts were cytotoxic to Artemia salina. Conclusions These findings suggest that the use of the roots, root barks, and root tubers of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans is limited by poor antimicrobial efficacy and cytotoxicity.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Qualitative and quantitative phytochemical composition, antimicrobial activity, and brine shrimp cytotoxicity of different solvent extracts of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans

et al. 2021

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“…The pronounced antioxidant and antibacterial action of eucalyptus leaf extracts has been experimentally confirmed. Eucalyptus leaves contain substances such as cineole and eucalypton, which are able to inhibit free radical processes [10][11][12]. However, there are no data on the use of eucalyptus leaf extracts as antioxidants for oils and oil-containing products, the effect of these antioxidants on the indicators of peroxide and acid numbers, which reflect the degree of product spoilage and the presence of harmful substances.…”

Section: Planning Of Experimental Research and Processing Of Resultsmentioning

confidence: 99%

Determination of the influence of natural antioxidant concentrations on the shelf life of sunflower oil

Sytnik

Kunitsa

Mazaeva

et al. 2020

EEJET

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Technology and equipment of food production ceutical products, etc. In addition, the use of oils and fats on their own is widespread in both food and non-food purposes. An acute problem associated with the obtaining, processing and use of oils is various types of spoilage, which lead 1. Introduction Oils and fats are one of the most important components of food, cosmetics and hygiene products, chemical and pharma

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“…After 4 days, the diameter of the pathogen colony (cm) was recorded. The inhibition percentage (I) was calculated using the following formula ( Nasr et al, 2019 ):…”

Section: Methodsmentioning

confidence: 99%

Termite Nest Associated Bacillus siamensis YC-9 Mediated Biocontrol of Fusarium oxysporum f. sp. cucumerinum

Zhou

Wang

et al. 2022

Front. Microbiol.

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The antagonistic potential of bacteria obtained from the nest of Odontotermes formosanus was assessed against Fusarium oxysporum f. sp. cucumerinum (FOC). Of 30, seven termite nest-associated bacteria strains had biocontrol potential. Among them, the strain YC-9 showed the strongest antifungal activity toward FOC. Phylogenetic analysis of the 16S rRNA amplified product of YC-9 revealed its identification as Bacillus siamensis. The in vivo antifungal activity experiment showed that the application of YC-9 at 108 cfu/ml significantly reduced the cucumber wilt incidence with a control efficacy of 73.2%. Furthermore, plant growth parameters such as fresh weight, dry weight, plant height, and root height were significantly improved by 42.6, 53.0, 20.8, and 19.3%, respectively. We found that inoculation with B. siamensis YC-9 significantly increased the activity of defensive enzymes such as peroxidase (POD), polyphenol oxidase (PPO), and phenylalanine ammonia-lyase (PAL) in diseased cucumber roots, thereby raising the resistance. PCR using gene-specific primers revealed that B. siamensis YC-9 contains biosynthetic genes for known antibiotics, including bacillomycin, iturin, and surfactin. Chemical analysis of the cultivation of B. siamensis YC-9 resulted in the isolation of five metabolites, including hexadecanoic acid (1), cyclo-(L-phenylalanylglycine) (2), cyclo-(L-trans-Hyp-L-Leu) (3), C15-surfactin (4), and macrolactin A (5), the structures of which were identified by the analysis of NMR spectroscopic data and MS. Among them, the compound 4 showed significant antifungal activity against conidial germination of FOC with an IC50 value of 5.1 μg/ml, which was comparable to that of the positive control, cycloheximide (IC50 value of 2.6 μg/ml). Based on these findings, this study suggests that termite-nest associated B. siamensis YC-9 could be a potential biological control agent for integrated control of soil-borne diseases like cucumber Fusarium wilt.

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Comparative effects of some extraction solvents on the antimicrobial activity of Eucalyptus camaldulensis leaf, bud, capsule and seed crude extracts

Cited by 19 publications

References 20 publications

Qualitative and quantitative phytochemical composition, antimicrobial activity, and brine shrimp cytotoxicity of different solvent extracts of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans

Qualitative and quantitative phytochemical composition, antimicrobial activity, and brine shrimp cytotoxicity of different solvent extracts of Acanthus polystachyus, Keetia gueinzii, and Rhynchosia elegans

Determination of the influence of natural antioxidant concentrations on the shelf life of sunflower oil

Termite Nest Associated Bacillus siamensis YC-9 Mediated Biocontrol of Fusarium oxysporum f. sp. cucumerinum

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