Antibacterial activities of the phytochemicals-characterized extracts of Callistemon viminalis, Eucalyptus camaldulensis and Conyza dioscoridis against the growth of some phytopathogenic bacteria

EL-Hefny, Mervat; Ashmawy, Nader A.; Salem, Mohamed Z. M.; Salem, Abdelfattah Z.M.

doi:10.1016/j.micpath.2017.11.004

Cited by 43 publications

(24 citation statements)

References 33 publications

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“…Identification of the constituents was performed based on an mass spectra (MS) library search (National Institute of Standards and Technology (NIST) and Wiley), and by comparing with data in the MS literature [43,44]. The EO compounds were confirmed using the Xcalibur 3.0 data system (3.0, Thermo Fisher Scientific Inc., Austin, TX, USA, 2014) with measuring their Standard Index and Reverse Standard Index [45][46][47][48].…”

Section: Gc-ms Analysis Conditionsmentioning

confidence: 99%

“…The lethal concentration causing 50% mortality (LC 50 ) of T. castaneum was calculated for tested EOs at different time periods (6,12,24,48, and 72 h). After 6 h of treatment, the LC 50 was 33.3, 6.8, >40, >40, and >40 µg/L air for EOs of S. terebinthifolius ripe fruits, S. terebinthifolius unripe fruits, S. terebinthifolius leaves, O. majorana leaves, and P. guajava leaves, respectively.…”

Section: Source Of Essential Oilmentioning

confidence: 99%

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Toxicological Activity of Some Plant Essential Oils Against Tribolium castaneum and Culex pipiens Larvae

et al. 2019

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In the present work, essential oils (EOs) from Schinus terebinthifolius (ripe and unripe fruits and leaves), Origanum majorana (air-dried aerial parts), and Psidium guajava (leaves) were assayed for their insecticidal activity against red flour beetle (Tribolium castaneum) and Culex mosquito larvae (Culex pipiens). Several components were identified in the EOs using Gas chromatography–mass spectrometry (GC/MS), of which Δ-3-carene (25.9%), γ-terpinene (19.4), and γ-elemene (7.1%) were the major ones in S. terebinthifolius ripe fruits, α-pinene (48.9%), germacrene D (12.9%), and α-thujene (7.7%) in S. terebinthifolius unripe fruits, γ-elemene (11.7%), spathulenol (10.1%), β-elemene (9.2%), and p-cymene (9.1%) in S. terebinthifolius leaves, α-pinene (25.5%), (E)-caryophyllene (15.7%), (E)-nerolidol (16.7%), and cedran-8-ol (8.8%) in P. guajava leaves, and terpinen-4-ol (21.7%), γ-terpinene (16.5%), and sabinene (10.1%) in O. majorana air-dried aerial parts. The lethal concentration (LC50) was calculated for tested EOs at different time periods (after 6, 12, 24, 48, and 72 h). After 6 h of treatment, the LC50 was 33.3 and 6.8 µg/L air for S. terebinthifolius ripe and unripe fruits, respectively, and >40 µg/L air for EOs of S. terebinthifolius leaves, O. majoranaair-dried aerial parts, and P. guajava leaves. After 24 h of treatment, the LC50 was 4.2, <2, 5, >40, and 6.1 µg/L air for EOs of S. terebinthifolius ripe fruits and leaves, O. majorana leaves, and P. guajava leaves, respectively. On the other hand, the LC50 values decreased when the exposed period was increased to 72 h, and were <2 µg/L air for EOs of S. terebinthifolius ripe fruits, unripe fruits, and leaves along with P. guajava leaves, respectively, and 37.912 for EO of O. majorana leaves. The LC50 value after 24 h of exposure of S. terebinthifolius unripe fruit EO was under 2 µg/L air, which means that the EO of S. terebinthifolius ripe fruit had a strong effect on adult T. castaneum adults compared to other tested EOs using the fumigation method. The present data confirm that the EOs of O. majorana leaves and S. terebinthifolius unripe fruits and leaves were more effective as larvicide than the EOs of S. terebinthifolius ripe fruits and P. guajava leaves on C. pipiens at a higher concentration (100 mg/L) when applied by the dipping method. EOs from S. terebinthifolius unripe or ripe fruits and leaves and P. guajava leaves were more effective as adulticide than EO of O. majorana leaves against T. castaneum when applied by the fumigant method.

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Section: Gc-ms Analysis Conditionsmentioning

confidence: 99%

Section: Source Of Essential Oilmentioning

confidence: 99%

Toxicological Activity of Some Plant Essential Oils Against Tribolium castaneum and Culex pipiens Larvae

et al. 2019

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“…The n-hexane oily extract from E. camaldulensis aerial parts (fruits, leaves and small branches) showed strong fungicidal activity towards the fungal isolates especially at the concentration of 3%. Previously, extracts and essential oils from E. camaldulensis have been known for their remarkable antimicrobial activities Elansary et al 2017;EL-Hefny et al 2017).…”

Section: Discussionmentioning

confidence: 99%

“…All parts of Eucalyptus camaldulensis L. are known to be a source of biologically active compounds such as essential oils, tannins, terpenoids, flavonoids, cardiac glycosides, phloroglucinol derivatives and phenolics (Babayi et al 2004;Essien and Akpan 2004;Adeniyi and Ayepola 2008;Salem et al 2015;Elansary et al 2017;EL-Hefny et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Fusarium culmorum , Penicillium chrysogenum and Rhizoctonia solani by n‐hexane extracts of three plant species as a wood‐treated oil fungicide

2019

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Aims Wood as a packing tool is used for packaging and transportation of fruits and vegetables for a time period varying from hours to days. During transportation, fruits and vegetables can be affected by moulds with significant postharvest problems. The present study describes the possibility of using wood‐treated oil fungicide of n‐hexane extracts from Eucalyptus camaldulensis (aerial parts), Vitex agenus‐castus (leaves) and Matricaria chamomilla (flowers) against the infestation of Fusarium culmorum, Rhizoctonia solani and Penicillium chrysogenum. Methods and Results Air‐dried wood samples of Melia azedarach were prepared with the dimensions of 0·5 × 1 × 2 cm and treated with the oily extracts at the concentrations of 0, 1, 2 and 3%. Oils extracted with n‐hexane from E. camaldulensis and V. agenus‐castus showed promising antifungal activities against the isolated and molecularly identified three fungi F. culmorum, R. solani and P. chrysogenum, while M. chamomilla observed the lowest activity against the studied fungi. GC/MS analysis of oils reported that the major components in E. camaldulensis were β‐fenchol (25·51%), Cyclobuta[1,2:3,4]dicyclooctene‐1,7(2H,6bH)‐dione,dodecahydro,(6αβ,6βα,12αα,12ββ)‐ (17·05), 1,8‐cineole (eucalyptol) (12·01%) and sabinene (9·45%); in V. agenus‐castus were eucalyptol (22·17%), (E)‐β‐caryophyllene (18·39%), and β‐sitosterol (12·44%); while in M. chamomilla were bisabolol oxide A (27·87%), (Z)‐β‐farnesene (16·11%), D‐limonene (14·18%) and chamazulene (11·27%). Conclusions The results suggest using n‐hexane oily extracts from E. camaldulensis and V. agenus‐castus as a biofungicide for wood protection. Significance and Impact of the Study This study highlights the importance of using bio‐friendly fungicide agents to protect wood against most common moulds occurring during handling of food packaging.

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“…the mass spectra were measured and collected under electron impact ionization at 70 electron volts and scanned from m/z 50-500 at five scans/second. The identification of the chemical compositions was performed based on an MS library search [41] and confirmed by measuring the Standard and Reverse Standard Indices [7,9,42,43].…”

Section: Gc/ms Analysis Of the Eosmentioning

confidence: 99%

The Biofungicide Activity of Some Plant Essential Oils for the Cleaner Production of Model Linen Fibers Similar to Those Used in Ancient Egyptian Mummification

et al. 2020

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In this work, the essential oils (EOs) from Eriocephalus africanus leaf, Vitex agnus-castus leaf and fruit, Cymbopogon citratus leaf, and Rosmarinus officinalis leaf were used as antifungal agents against isolated Aspergillus flavus, Cladosporium cladosporioides, and Penicillium chrysogenum from an ancient Egyptian child’s mummy. The isolated fungi were used to colonize the samples of linen fibers. The best oil was used as a novel natural product for the cleaner production of model linen fibers similar to those used in ancient Egyptian mummification. Standard and original linen fibers were compared with the infected Linen samples using Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analyses. The FTIR revealed the changes in the molecular structure of the cellulose, hemicellulose, and lignin of the infected linen fibers. The cellulose crystallinity indices decreased to 64.61%, 52.69%, and 54.63% in the linen inoculated with A. flavus, C. cladosporioides, and P. chrysogenum compared to the control sample (72.08%), thereby affecting the chemical properties of the cellulose. The mycelia inhibition percentages of the three fungi reached 100% after the leaf EO from V. agnus-castus was applied, followed by C. citratus. The V. agnus-castus leaf EO applied at contraptions of 250, 500, 50, 1000, and 2000 µL/mL showed 100% inhibition for A. flavus and P. chrysogenum and reached 100% against C. cladosporioides at concentrations of 500, 750, 1000, and 2000 µL/mL. C. citratus leaf essential oil applied at concentrations of 500, 750, 1000, and 2000 µL/mL showed 100% inhibition to the growth of A. flavus and C. cladosporioides and reached 100% inhibition against the growth of P. chrysogenum at concentrations of 750, 1000 and 2000 µL/mL. This inhibition could be related to the main compounds of caryophyllene (23.13%), eucalyptol (20.59%), sabinene (β-thujene) (12.2%), γ-elemene (9%), and β-farnesene (6.14%) identified in V. agnus-castus leaf EO or due to the main compounds of β-citral (43.63%) and geranial (41.51%), as identified in the leaf EO of C. citratus by GC/MS. The morphological changes in the hyphae of the fungi were observed via SEM examination, where V. agnus-castus leaf EO, the best active oil, showed potent inhibition to fungi grown on the model linen fiber. In this way, the morphology and the structure of the hyphae were effectively changed. Our findings prove that the designed model linen fiber treated with V. agnus-castus leaf EO is able to preserve wrapping fibres and represents a novel natural alternative for effective fungicidal treatment.

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Antibacterial activities of the phytochemicals-characterized extracts of Callistemon viminalis, Eucalyptus camaldulensis and Conyza dioscoridis against the growth of some phytopathogenic bacteria

Cited by 43 publications

References 33 publications

Toxicological Activity of Some Plant Essential Oils Against Tribolium castaneum and Culex pipiens Larvae

Toxicological Activity of Some Plant Essential Oils Against Tribolium castaneum and Culex pipiens Larvae

Inhibition of Fusarium culmorum , Penicillium chrysogenum and Rhizoctonia solani by n‐hexane extracts of three plant species as a wood‐treated oil fungicide

The Biofungicide Activity of Some Plant Essential Oils for the Cleaner Production of Model Linen Fibers Similar to Those Used in Ancient Egyptian Mummification

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