Constituents and antibacterial activity of leaf essential oil of <i>Plectranthus scutellarioides</i>

Aziz, Pakeeza; Nadeem, Muhammad; Intisar, Azeem; Abid, Muhammad Amin; Din, Muhammad Imran; Yaseen, Muhammad; Kousar, Rehana; Aamir, Aqsa; Quratulain, -; Ejaz, Rabia

doi:10.1080/11263504.2020.1837279

Cited by 17 publications

(10 citation statements)

References 37 publications

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“…The coleus leave s contain a remarkable amount of red anthocyanins (Logan et al, 2015 ). This herb has also reported significant antimicrobial and antioxidant activity (Aziz et al, 2020 ). Therefore, this research investigated C. scutellarioides anthocyanin extract as a natural source of anthocyanins to develop an intelligent packaging film based on fish gelatin biopolymer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of an intelligent film based on fish gelatin and Coleus scutellarioides anthocyanin to monitor the freshness of rainbow trout fish fillet

Hematian

Baghaei

Nafchi

et al. 2022

Food Science & Nutrition

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In this study, a pH‐sensitive indicator based on fish gelatin and Coleus scutellarioides anthocyanin extract (CSAE) was prepared and characterized. Films were prepared using the solvent casting method and different levels of CSAE, including 10 ml (CSG1), 20 ml (CSG2), and 30 ml (CSG3), and 0 ml (CSG0) as a control sample. The mechanical, optical, and pH sensing of active films and the release of anthocyanins from the films were investigated. The relationship between the total volatile basic nitrogen (TVB‐N) of fish fillets and a* color index of films was studied. By incorporation of CSAE, the flexibility of films increased, while the tensile strength and UV–Vis light transmittance through the films decreased (p < .05). The films containing the CSAE had a darker, yellowish, and reddish color than the control film. There was a significant relationship between the pH variation and the film color. The films had a purple color at acidic pH, and their color changed to green at an alkaline pH, indicating the sensitivity of the produced films to pH changes. There was a significant relationship between the TVB‐N value of fish fillets and the a* index of the film during the 16 h storage time. The results showed that by increasing TVB‐N values of the fillets, the a* color index decreased, and the films' color changed from purple to colorless. In summary, the active films prepared with fish gelatin and CSAE could be used as pH‐sensitive intelligent packaging to display the freshness of fishery products.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of an intelligent film based on fish gelatin and Coleus scutellarioides anthocyanin to monitor the freshness of rainbow trout fish fillet

Hematian

Baghaei

Nafchi

et al. 2022

Food Science & Nutrition

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“…However, no studies addressed the isolated action of caryophyllene and spathulenol in inhibiting MRSA and MSSA strains. However, EO that contained caryophyllene or spathulenol as one of its major compounds inhibited the action of these strains and their biofilms [ 51 , 52 , 53 , 54 ]. This points to the development of studies investigating the potential activity of these compounds in inhibiting MRSA or MSSA strains.…”

Section: Discussionmentioning

confidence: 99%

Synergistic and Antibiofilm Effects of the Essential Oil from Croton conduplicatus (Euphorbiaceae) against Methicillin-Resistant Staphylococcus aureus

et al. 2022

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Bacterial resistance refers to the ability of bacteria to resist the action of some antibiotics due to the development of adaptation and resistance mechanisms. It is a serious public health problem, especially for diseases caused by opportunistic bacteria. In this context, the search for new drugs, used alone or in combination, appears as an alternative for the treatment of microbial infections, and natural products, such as essential oils, are important in this process due to their structural diversity, which increases the probability for antimicrobial action. The objective of this study was to extract and identify the chemical components of the essential oil from Croton conduplicatus (EOCC), to evaluate the antimicrobial activity, to investigate the effect of the interaction between the EOCC and different antibiotics and to evaluate its antibiofilm potential. The EOCC was obtained by hydrodistillation. Based on chemical characterisation, 70 compounds were identified, with 1.8 cineole (13.15%), p-cymene (10.68%), caryophyllene (9.73%) and spathulenol (6.36%) being the major constituents. The minimum inhibitory concentration (MIC) values of EOCC were 256 and 512 µg mL−1 for methicillin-sensitive and -resistant Staphylococcus aureus strains (MSSA and MRSA), respectively. The combinations of EOCC with the antibiotics oxacillin and ampicillin were synergistic (OXA/EOCC and AMP/EOCC combined decreased the OXA MIC and AMP MIC to 0.5 and 0.25 for MSSA, respectively, and OXA/EOCC and AMP/EOCC combined decreased the OXA MIC and the AMP MIC to 1 and 0.5 for MRSA, respectively) and could modify the resistance profile of MSSA and MRSA strains. The results indicated that EOCC was also able to partially inhibit biofilm formation. Our study presents important information about the chemical composition of EOCC and its antimicrobial potential and provides a reference to determine the mechanisms of action of EOCC and its use in pharmaceutical formulations.

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“…The classification of the identified constituents is provided in Table 2. The major classes belong to terpenoids (including terpenes and terpenoid alcohols) and fatty acids where these classes also known to exhibit various pharmacological and aroma imparting properties [45][46][47] .…”

Section: Figure 1 Total Ion Chromatogram Of the Volatile Oil Of Leave...mentioning

confidence: 99%

Volatile Constituents of Leaves of Trifolium alexandrinum

Faiz¹,

Intisar²,

Sharif³

et al. 2022

j. of bot. res.

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This study presents the volatile constituents from leaves of Trifolium alexandrinum from Pakistan. The dried leaves were subjected to hydrodistillation for extraction and extracted volatile oil was subsequently characterized by gas chromatography-mass spectrometry technique. A total of 22 compounds were identified where the most dominant constituents were: phytol (46.00%), palmitic acid (9.26%), phytol acetate (6.44%), and linolenic acid (3.47%). Most of these are well-known constituents to exhibit antibacterial, antioxidant, antitumor, and anti-inflammatory activities.

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Constituents and antibacterial activity of leaf essential oil of Plectranthus scutellarioides

Cited by 17 publications

References 37 publications

Preparation and characterization of an intelligent film based on fish gelatin and Coleus scutellarioides anthocyanin to monitor the freshness of rainbow trout fish fillet

Preparation and characterization of an intelligent film based on fish gelatin and Coleus scutellarioides anthocyanin to monitor the freshness of rainbow trout fish fillet

Synergistic and Antibiofilm Effects of the Essential Oil from Croton conduplicatus (Euphorbiaceae) against Methicillin-Resistant Staphylococcus aureus

Volatile Constituents of Leaves of Trifolium alexandrinum

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