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Biosynthesis, Function, and Application of Plant Volatiles II
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Biosynthesis, Function, and Application of Plant Volatiles II

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Phytochemistry".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 4620

Special Issue Editors

Prof. Dr. Sheng-Yang Wang

E-Mail Website1 Website2
Guest Editor
Department of Forestry, National Chung Hsing University, Taichung 402, Taiwan
Interests: essential oils; terpenoid biosynthesis; phytomedicines; plant metabolomics
Special Issues, Collections and Topics in MDPI journals
Dr. K.J. Senthil Kumar

E-Mail Website
Guest Editor
Center for General Education, National Chung Hsing University, Taichung-402, Taiwan
Interests: phytomedicine, natural products, essential oils, prebiotics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plant synthesis involves a large number of volatile compounds. These small, chemically diverse metabolites give plants fragrance and serve multiple functions in the reproduction of plants and their protection from environmental stress. They also act as protectors to repel herbivores and pathogens, protecting plants from abiotic stress and activating resistance traits in neighboring plants via airborne plant–plant signaling. Besides their function in ecosystems, plant volatiles play important roles in many traits of human behavior and are widely applied in the pharmaceutical, nutritional, and industries. Although tremendous progress has been achieved in elucidating the function of volatiles in plant physiology and ecology, the biosynthesis, new function, bioactivities, and industry development of plant volatiles are worth significant investment. The goal of this Special Issue of Plants is to provide insightful and critical advances in the field of biosynthesis, function, and application of plant volatiles. This includes research and reviews. Reviews should discuss the experiments or technical constraints needed to advance the field, including suggestions of novel approaches to discover missing links and speculations that go beyond current knowledge but based on sound science. Research papers should highlight new developments and directions that would advance the field.

Prof. Dr. Sheng-Yang Wang
Dr. K.J. Senthil Kumar
Guest Editors

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. Plants 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 2700 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

  • essential oil
  • terpene synthesis
  • abiotic stress
  • biotic stress
  • ecology
  • bioactivity
  • fragrance
  • aromatherapy
  • cosmetics

Published Papers (3 papers)

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Research

20 pages, 3204 KiB  
Article
Antibacterial Activity and Anxiolytic Effect in Adult Zebrafish of Genus Lippia L. Species
by Carla de Fatima Alves Nonato, Emerson Vinicius Silva de Melo, Cicera Janaine Camilo, Maria Kueirislene Amâncio Ferreira, Jane Eire Alencar de Meneses, Antonio Wlisses da Silva, Hélcio Silva dos Santos, Jaime Ribeiro-Filho, Joanda Paolla Raimundo e Silva, Josean Fechine Tavares, Irwin Rose Alencar de Menezes, Henrique Douglas Melo Coutinho, Grażyna Kowalska, Tomasz Baj, Radosław Kowalski and José Galberto Martins da Costa
Plants 2023, 12(8), 1675; https://doi.org/10.3390/plants12081675 - 17 Apr 2023
Cited by 2 | Viewed by 1617
Abstract
Species belonging to the genus Lippia are used worldwide as foods, beverages, and seasonings. Studies have demonstrated that these species have antioxidant, sedative, analgesic, anti-inflammatory, and antipyretic activities. This work aimed to evaluate the antibacterial activity and anxiolytic effect by different pathways of [...] Read more.
Species belonging to the genus Lippia are used worldwide as foods, beverages, and seasonings. Studies have demonstrated that these species have antioxidant, sedative, analgesic, anti-inflammatory, and antipyretic activities. This work aimed to evaluate the antibacterial activity and anxiolytic effect by different pathways of essential oils and ethanolic extracts of three species of Lippia (Lippia alba, Lippia sidoides, and Lippia gracilis). The ethanolic extracts were characterized by HPLC-DAD-ESI-MSn and their phenolics were quantified. The antibacterial activity was evaluated by determining the minimal inhibitory concentration and modulation of antibiotic activity, and toxic and anxiolytic effects were evaluated in the zebrafish model. The extracts showed compositions with a low ratio and shared compounds. L. alba and L. gracilis showed higher amounts of phenols and flavonoids, respectively. All extracts and essential oils presented antibacterial activity, especially those obtained from L. sidoides. On the other hand, L. alba extract presented the most significant antibiotic-enhancing effect. The samples were not toxic after 96 h of exposure, but showed an anxiolytic effect through modulation of the GABAA receptor, while L. alba extract acted via modulation of the 5-HT receptor. This new pharmacological evidence opens horizons for therapeutic approaches targeting anxiolytic and antibacterial therapies and food conservation using these species and their constituents. Full article
(This article belongs to the Special Issue Biosynthesis, Function, and Application of Plant Volatiles II)
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13 pages, 2038 KiB  
Article
Conventional vs. Microwave-Assisted Hydrodistillation: Influence on the Chemistry of Sea Fennel Essential Oil and Its By-Products
by Olivera Politeo, Marijana Popović, Maja Veršić Bratinčević, Petra Koceić, Tonka Ninčević Runjić and Ivana Generalić Mekinić
Plants 2023, 12(7), 1466; https://doi.org/10.3390/plants12071466 - 27 Mar 2023
Cited by 7 | Viewed by 1324
Abstract
The main objectives of this study were to investigate the effects of the applied essential oil (EO) isolation method, conventional hydro-distillation (HD), and microwave-assisted hydro-distillation (MHD) on the chemical profile of sea fennel (Crithmum maritimum L.) essential oil and to investigate the [...] Read more.
The main objectives of this study were to investigate the effects of the applied essential oil (EO) isolation method, conventional hydro-distillation (HD), and microwave-assisted hydro-distillation (MHD) on the chemical profile of sea fennel (Crithmum maritimum L.) essential oil and to investigate the main constituents present in the liquid by-products of EOs isolation (hydrolate and residual wastewater). Headspace-solid phase microextraction (HS-SPME) was used to isolate hydrolate components, while gas chromatography coupled with mass spectrometry (GC-MS) was used to detect and analyse the chemical constituents of the essential oils and hydrolates. The phenolic composition of the wastewater extracts was analysed by high performance liquid chromatography (HPLC). The EO obtained by MHD had a higher yield of limonene and sabinene. The chemical composition of the hydrolates differed from the EO compositions. The content of terpinen-4-ol in the MHD hydrolate was higher, while several compounds were detected in relatively high proportions only in the HD hydrolate. MHD also resulted in a higher phenolic content of the wastewater, where an increase in the concentration of chlorogenic acid was also observed. It can be concluded that the isolation method had a great influence on the profile of sea fennel EOs, especially on their corresponding hydrolates and residual wastewater extracts. Due to their valuable chemical composition, these by-products can be a cost-effective source of bioactive compounds that have great potential for use in various industries. Full article
(This article belongs to the Special Issue Biosynthesis, Function, and Application of Plant Volatiles II)
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14 pages, 3000 KiB  
Article
Essential Oil from Glossogyne tenuifolia Inhibits Lipopolysaccharide-Induced Inflammation-Associated Genes in Macro-Phage Cells via Suppression of NF-κB Signaling Pathway
by Wan-Teng Lin, Yen-Hua He, Yun-Hsin Lo, Yu-Ting Chiang, Sheng-Yang Wang, Ismail Bezirganoglu and K. J. Senthil Kumar
Plants 2023, 12(6), 1241; https://doi.org/10.3390/plants12061241 - 09 Mar 2023
Cited by 3 | Viewed by 1312
Abstract
Glossogyne tenuifolia Cassini (Hsiang-Ju in Chinese) is a perennial herb native to Taiwan. It was used in traditional Chinese medicine (TCM) as an antipyretic, anti-inflammatory, and hepatoprotective agent. Recent studies have shown that extracts of G. tenuifolia possess various bioactivities, including anti-oxidant, [...] Read more.
Glossogyne tenuifolia Cassini (Hsiang-Ju in Chinese) is a perennial herb native to Taiwan. It was used in traditional Chinese medicine (TCM) as an antipyretic, anti-inflammatory, and hepatoprotective agent. Recent studies have shown that extracts of G. tenuifolia possess various bioactivities, including anti-oxidant, anti-inflammatory, immunomodulation, and anti-cancer properties. However, the pharmacological activities of G. tenuifolia essential oils have not been studied. In this study, we extracted essential oil from air-dried G. tenuifolia plants, then investigated the anti-inflammatory potential of G. tenuifolia essential oil (GTEO) on lipopolysaccharide (LPS)-induced inflammation in murine macrophage cells (RAW 264.7) in vitro. Treatment with GTEO (25, 50, and 100 μg/mL) significantly as well as dose-dependently inhibited LPS-induced pro-inflammatory molecules, such as nitric oxide (NO) and prostaglandin E2 (PGE2) production, without causing cytotoxicity. Q-PCR and immunoblotting analysis revealed that the inhibition of NO and PGE2 was caused by downregulation of their corresponding mediator genes, inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2), respectively. Immunofluorescence and luciferase reporter assays revealed that the inhibition of iNOS and COX-2 genes by GTEO was associated with the suppression of nuclear export and transcriptional activation of the redox-sensitive transcription factor, nuclear factor -κB (NF-κB). In addition, GTEO treatment significantly inhibited phosphorylation and proteosomal degradation of the inhibitor of NF-κB (I-κBα), an endogenous repressor of NF-κB. Moreover, treatment with GTEO significantly blocked the LPS-mediated activation of inhibitory κB kinase α (IKKα), an upstream kinase of the I-κBα. Furthermore, p-cymene, β-myrcene, β-cedrene, cis-β-ocimene, α-pinene, and D-limonene were represented as major components of GTEO. We found that treatment with p-cymene, α-pinene, and D-limonene were significantly inhibiting LPS-induced NO production in RAW 264.7 cells. Taken together, these results strongly suggest that GTEO inhibits inflammation through the downregulation of NF-κB-mediated inflammatory genes and pro-inflammatory molecules in macrophage cells. Full article
(This article belongs to the Special Issue Biosynthesis, Function, and Application of Plant Volatiles II)
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