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Plant Phenolic Compounds: From Biosynthesis to Functional Profiling
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Plant Phenolic Compounds: From Biosynthesis to Functional Profiling

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

Deadline for manuscript submissions: 15 July 2025 | Viewed by 3325

Special Issue Editor

Dr. Lahcen Hssaini

E-Mail Website
Guest Editor
Department of Food Technology and Quality, Institut National de la Recherche Agronomique, INRA Morocco, Meknes, Morocco
Interests: farming; food processing; food preservation; food chemistry; food quality; food & nutrition; food analysis; food safety; food science and technology; food processing and engineering

Special Issue Information

Dear Colleagues,

Plant phenolic compounds are a diverse group of secondary metabolites that play critical roles in plant defense mechanisms and exhibit a wide range of beneficial effects for human health. Their remarkable properties have attracted scientists worldwide, prompting a surge in research. Yet, there is still much to discover and learn about these compounds. This Special Issue of Plants aims to serve as a platform for scientists to share their pioneering research and advance our understanding of these fascinating compounds. We invite contributions that uncover the intricate pathways of phenolic biosynthesis, delve into the complexities of their structural diversity, and decipher the mechanisms behind their powerful biological activities. We encourage authors to submit well-designed original research papers on all aspects of plant phenolics, including the biosynthesis and regulation of these compounds; their characterization and profiling of biological activities; their bioavailability and biotransformation; and exploring future perspectives. We also encourage submissions that explore emerging technologies and research directions that hold promise for the future of this field. This Special Issue aspires to serve as a comprehensive resource, showcasing the latest advancements in the field while also identifying promising areas for future research. We encourage authors to submit papers that challenge existing knowledge and contribute to the development of new applications for these remarkable compounds, ultimately leading to improved human health and well-being. In addition to original research, we also welcome high-quality, comprehensive literature reviews that synthesize current knowledge and identify emerging trends in the field of plant phenolic research.

Dr. Lahcen Hssaini
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. 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

  • biosynthesis pathway
  • bioavailability
  • gene regulation
  • phenol structural diversity
  • phenol analysis
  • flavonoids
  • anthocyanins
  • tannins
  • lignans
  • chromatography
  • spectroscopy
  • mass spectrometry
  • antioxidant activity
  • anti-inflammatory activity
  • antimicrobial activity
  • cardiometabolic health

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Published Papers (3 papers)

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Research

16 pages, 3204 KiB  
Article
Ultraviolet-A Radiation (UVA) as a Stress and the Influence of Provenance and Leaf Age on the Expression of Phenolic Compounds by Eucalyptus camaldulensis ssp. camaldulensis
by Santosh Khanal, Simone J. Rochfort and Martin J. Steinbauer
Plants 2025, 14(3), 493; https://doi.org/10.3390/plants14030493 - 6 Feb 2025
Viewed by 822
Abstract
Ultraviolet radiation (UV) represents a significant abiotic stress, affecting green plants. Phenolic compounds have been suggested as components involved in plant photoprotective adaptation. We used a unique combination of experimental (LED lighting and leaf tagging) and analytical (unbiased, or untargeted, metabolomics) approaches to [...] Read more.
Ultraviolet radiation (UV) represents a significant abiotic stress, affecting green plants. Phenolic compounds have been suggested as components involved in plant photoprotective adaptation. We used a unique combination of experimental (LED lighting and leaf tagging) and analytical (unbiased, or untargeted, metabolomics) approaches to study the effects of high (approximating mid-summer) and low (approximating winter) levels of UVA on the expression of phenolic compounds. These consisted of river red gum (Eucalyptus camaldulensis ssp. camaldulensis) of five provenances. The geographically separated provenances used in our study spanned the lowest and highest latitudes of the range of this subspecies. The concentrations of gallotannins and ellagitannins (i.e., hydrolysable tannins) increased most under high levels of UVA, but responses only differed slightly among provenances. The most substantial changes in the composition of phenolic compounds were associated with leaf age. Overall, 3-month-old (herein, termed ‘young’) leaves had substantially different phenolic compositions to 6- and 12-month-old (‘old’) leaves. Hydrolysable tannins were more abundant in young leaves, whereas pedunculagin, catechin, and kaempferol galloyl glucoses were more abundant in old leaves. High levels of UVA altered the expression of phenolic compounds, but our experimental saplings were unlikely to experience photoinhibition because they were not exposed to high levels of light and low temperatures, nor were they nitrogen-limited. We expect that changes in phenolic compounds would have been more pronounced if we had induced photoinhibition. Full article
(This article belongs to the Special Issue Plant Phenolic Compounds: From Biosynthesis to Functional Profiling)
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14 pages, 752 KiB  
Article
Phytochemicals and Biological Properties of Azorean Camellia sinensis Black Tea Samples from Different Zones of Tea Plantation
by Lisete Sousa Paiva, Ana Paula Dias, Madalena Hintze Motta and José António Bettencourt Baptista
Plants 2025, 14(1), 103; https://doi.org/10.3390/plants14010103 - 2 Jan 2025
Cited by 1 | Viewed by 758
Abstract
Camellia sinensis tea has received considerable attention due to its beneficial effects on health, particularly due to its antioxidant properties that are affected by several factors, which have a high influence on the final quality of black tea. The objective of this study [...] Read more.
Camellia sinensis tea has received considerable attention due to its beneficial effects on health, particularly due to its antioxidant properties that are affected by several factors, which have a high influence on the final quality of black tea. The objective of this study was to investigate the biological properties of Azorean C. sinensis black tea from five different zones of tea plantation in order to select specific areas to cultivate tea rich in targeted compounds beneficial to human health. The free radical scavenging activity (FRSA), ferric reducing antioxidant power (FRAP), ferrous ion chelating (FIC) activities, total phenolic content (TPC), total flavonoid content (TFC), and tannins were determined by colorimetric methods, and catechin and theaflavin contents were analyzed by high-pressure liquid chromatography. The results indicated that samples from Zone E (341 m above the sea level) presented higher values of FRSA (EC50 = 7.22 µg/mL), FRAP (EC50 = 9.06 µg/mL), and FIC activities (79.83%) and higher values of total phenolics (264.76 mg GAE/g DE) and almost all catechins. For TFC, the values were very similar between zones, and for theaflavins content, Zone A showed the best levels, followed by Zone E. In general, these results clearly highlight that altitude plays a significant role in enhancing certain compounds of tea, thereby influencing its quality. Full article
(This article belongs to the Special Issue Plant Phenolic Compounds: From Biosynthesis to Functional Profiling)
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27 pages, 1052 KiB  
Article
Foliar Nutrition Strategies for Enhancing Phenolic and Amino Acid Content in Olive Leaves
by Marija Polić Pasković, Mirjana Herak Ćustić, Igor Lukić, Šime Marcelić, Paula Žurga, Nikolina Vidović, Nikola Major, Smiljana Goreta Ban, Marija Pecina, Josip Ražov, Matevž Likar, Paula Pongrac and Igor Pasković
Plants 2024, 13(24), 3514; https://doi.org/10.3390/plants13243514 - 16 Dec 2024
Viewed by 1191
Abstract
Studies on selenium (Se) and silicon (Si) foliar biostimulation of different plants have been shown to affect concentrations of phenolic compounds. However, their effects on olive (Olea europaea L.) primary and secondary metabolites have not been fully investigated. Therefore, the effects of [...] Read more.
Studies on selenium (Se) and silicon (Si) foliar biostimulation of different plants have been shown to affect concentrations of phenolic compounds. However, their effects on olive (Olea europaea L.) primary and secondary metabolites have not been fully investigated. Therefore, the effects of foliar sprayed Si and Se and their combination on the concentration of phenols, selected metabolites involved in the phenol biosynthesis, and mineral elements concentrations were determined in olive leaves of the field-grown cultivar Leccino. During the summer period, leaves were foliar sprayed three times, after which were sampled 30 days after the corresponding application. In general, foliar treatment of Si or Se increased the concentrations of several predominant phenolic compounds, such as oleuropein, oleacein, and specific flavonoids. The effects were especially pronounced after the third application in the harvest time sampling time. Amino acids and other phenol precursors were also significantly affected. The effects were phenol-specific and depended on the treatment, sampling time, and treatment × sampling time interaction. The response of verbascoside to the applied treatments appeared to be closely linked to corresponding changes in its amino acid precursors, such as tyrosine, while its connection with tryptophan and IAA has to be cautiously considered. In contrast, for other phenolic compounds like secoiridoids, a clear interdependence with their precursors was not identified, likely due to the more complex nature of their biosynthesis. The effects on the concentrations of elements other than Se and Si were milder. Full article
(This article belongs to the Special Issue Plant Phenolic Compounds: From Biosynthesis to Functional Profiling)
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