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Novel Research on Antibacterial Activity of Plant Extract and Essential...
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Novel Research on Antibacterial Activity of Plant Extract and Essential Oils

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Biosciences and Bioengineering".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 1641

Special Issue Editor

Dr. Markéta Houdková

E-Mail Website
Guest Editor
Department of Crop Science and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague, Czech Republic
Interests: biologically active natural products; phytochemicals; food and agricultural chemistry; ethnobotany and ethnopharmacology

Special Issue Information

Dear Colleagues,

Currently, there is a growing interest in plant products that benefit human health. Plant extracts and essential oils are examples of plant-derived products composed of a wide range of phytochemicals possessing a broad spectrum of biological effects. The use of plant-derived products in the pharmaceutical, food, and cosmetic industries is increasing and reducing the risk of microbial infections. They serve as a substitute for commonly prescribed synthetic preparations, for which a number of undesirable side effects have been described. The advantages of preparations based on plants are lower toxicity, lower risk of a negative impact on the environment due to their biodegradability, and chemical diversity.

The papers in this Special Issue will provide up-to-date literature analysis and newly generated experimental data that are obtained through innovative approaches for evaluating the antimicrobial effectiveness of plant extracts and essential oils. This information should be useful for medicinal, pharmaceutical, food, and agricultural experts working in areas related to the management of infectious disease, food preservation, and the protection of agriculture products.

Dr. Markéta Houdková
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • antimicrobial activity
  • aromatic plants
  • biological effects
  • essential oils
  • human health
  • medicinal plant
  • natural compounds
  • phytochemistry
  • plant extracts
  • plant volatiles

Published Papers (2 papers)

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Research

15 pages, 2144 KiB  
Article
Chemical Composition and Antimicrobial Activity of Essential Oils and Hydrosols from Oregano, Sage and Pennyroyal against Oral Pathogens
by Alexandros Bairamis, Nefeli-Sofia D. Sotiropoulou, Christina Tsadila, Petros Tarantilis and Dimitris Mossialos
Appl. Sci. 2024, 14(8), 3238; https://doi.org/10.3390/app14083238 - 11 Apr 2024
Viewed by 949
Abstract
In this study, the chemical composition of essential oils (EOs) extracted from Origanum vulgare ssp. hirtum Lamiaceae, (oregano), Salvia officinalis Lamiaceae (sage), Mentha pulegium Lamiaceae (pennyroyal), and respective hydrosols (HSs) has been investigated by Gas Chromatography–Mass Spectrometry (GC-MS). The antimicrobial activity was assessed [...] Read more.
In this study, the chemical composition of essential oils (EOs) extracted from Origanum vulgare ssp. hirtum Lamiaceae, (oregano), Salvia officinalis Lamiaceae (sage), Mentha pulegium Lamiaceae (pennyroyal), and respective hydrosols (HSs) has been investigated by Gas Chromatography–Mass Spectrometry (GC-MS). The antimicrobial activity was assessed against two oral pathogens: Gram-positive bacterium Streptococcus mutans and the fungus Candida albicans by determination of Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal/Fungicidal concentration (MBC/MFC). Three-fold diluted solutions were dispensed into each well of a 96-well microtiter plate and, after incubation, MIC was determined by visual monitoring. The MBC/MFC was determined by transferring a small quantity of sample contained in each replicate well of the microtiter plates to appropriate culture media using a microplate replicator. The EOs of the tested herbs showed antimicrobial properties, especially the EO oil of O. vulgare, which exerted the highest antimicrobial activity. HSs of S. officinalis and M. pulegium exerted no antimicrobial activity, in contrast to oregano HS, which displayed strong antimicrobial activity. In all cases, a higher number of compounds were detected in EOs than in the corresponding HSs. The major compounds of sage EO were detected to be α-thujone (25.1%), 1,8-cineole (15.8%) and β-pinene (10.0%), while the HS was characterized by the presence of 1,8-cineole (32.6%), borneol (22.6%) and α-thujone (22.4%). Pennyroyal EO and HS consists mainly of pulegone (62.1 and 50.6%, respectively). Carvacrol was the major component present in EO (63%) and HS (97.3%) of oregano, probably contributing to the antimicrobial activity. Further research is needed in order to elucidate the antimicrobial mechanisms of specific compounds present in essential oils and hydrosols of Lamiaceae grown in Greece against oral pathogens. Full article
(This article belongs to the Special Issue Novel Research on Antibacterial Activity of Plant Extract and Essential Oils)
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20 pages, 13638 KiB  
Article
Pesticidal Potential of Essential Oil Obtained from a New Variety of Marigold (Tagetes patula L., fam. Asteraceae)
by Catalina Tudora, Florin Nenciu, Adriana Muscalu, Floarea Burnichi, Florentina Gatea, Oana Alina Boiu-Sicuia and Florentina Israel-Roming
Appl. Sci. 2024, 14(8), 3159; https://doi.org/10.3390/app14083159 - 09 Apr 2024
Viewed by 381
Abstract
Essential oils (EOs) extracted from various medicinal plants offer a promising alternative to non-selective chemical substances commonly employed in conventional agriculture. Their chemical composition includes several classes of chemical compounds with beneficial properties, such as monoterpenes, sesquiterpenes, and phenylpropanoids, which can selectively control [...] Read more.
Essential oils (EOs) extracted from various medicinal plants offer a promising alternative to non-selective chemical substances commonly employed in conventional agriculture. Their chemical composition includes several classes of chemical compounds with beneficial properties, such as monoterpenes, sesquiterpenes, and phenylpropanoids, which can selectively control microbiological elements in soil and plants. The aim of the present study was to evaluate the essential oils and floral waters obtained from a new variety of marigold (Tagetes patula L., fam. Asteraceae, “Nanuk” variety) across various parameters, including biochemical characterization using GC-MS, antioxidant activity evaluated under three methods (DPPH, ABTS, FRAP), antimicrobial properties (for three G− bacteria: Perctobacterium carotovorum, Pseudomonas marginalis, Pseudomonas syringae and against three phytopathogenic fungi: Rhizoctonia solani, Fusarium oxysporum, Botrytis cinerea), and insecticidal activity. The results showed that when applied in high concentrations, marigold essential oil has a potential bactericidal effect on P. carotovorum, as well as a potential fungicidal effect on B. cinerea. Full article
(This article belongs to the Special Issue Novel Research on Antibacterial Activity of Plant Extract and Essential Oils)
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