Discovery, Isolation, Purification and Bioactivity Evaluation of Plant Extract

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

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 1954

Special Issue Editor

Faculty of Food Engineering, Tourism and Environmental Protection, “Aurel Vlaicu” University of Arad, Elena Dragoi Street no. 2, 310330 Arad, Romania
Interests: volatile organic compounds; environmental engineering; environmental science; environmental health; plants metabolites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is generally accepted that plant extracts are the most important sources of biomolecules, which may be isolated from various plant parts. Due to the wide variety of plant species, implementing extraction and purification methods could be challenging for researchers. Successful extraction and purification require a sufficient amount of extracts and biomolecules for characterization. In the same way, evaluating those extracts could highlight essential properties and open their diverse possible usage.

We invite you to contribute your research to this Special Issue of Plants, welcoming articles on plant extraction methods, purification techniques, evaluation of different properties (including antimicrobial, antibacterial, or antioxidant activities), and the industrial applications of plant extracts to acquire an overview of the present status of the research in this field.

Prof. Dr. Lucian Copolovici
Guest Editor

Manuscript Submission Information

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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.

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Published Papers (1 paper)

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Research

20 pages, 3669 KiB  
Article
Antibacterial, Antifungal and Algicidal Activity of Phlorotannins, as Principal Biologically Active Components of Ten Species of Brown Algae
by Valeriya Lemesheva, Renata Islamova, Elena Stepchenkova, Aleksandr Shenfeld, Claudia Birkemeyer and Elena Tarakhovskaya
Plants 2023, 12(4), 821; https://doi.org/10.3390/plants12040821 - 12 Feb 2023
Cited by 2 | Viewed by 1653
Abstract
Marine seaweeds synthesize a plethora of bioactive metabolites, of which phlorotannins of brown algae currently attract special attention due to their high antibiotic and cytotoxic capacities. Here we measured the minimum inhibitory concentrations (MICs) of several semi-purified phlorotannin preparations of different origins and [...] Read more.
Marine seaweeds synthesize a plethora of bioactive metabolites, of which phlorotannins of brown algae currently attract special attention due to their high antibiotic and cytotoxic capacities. Here we measured the minimum inhibitory concentrations (MICs) of several semi-purified phlorotannin preparations of different origins and molecular composition using a set of model unicellular organisms, such as Escherichia coli, Saccharomyces cerevisiae, Chlamydomonas reinhardtii, etc. For the first time, MIC values were evaluated for phlorotannin-enriched extracts of brown algae of the orders Ectocarpales and Desmarestiales. Phlorotannin extracts of Desmarestia aculeata, Fucus vesiculosus, and Ectocarpus siliculosus showed the lowest MIC values against most of the treated organisms (4–25 μg/mL for bacteria and yeast). Analysis of the survival curves of E. coli showed that massive loss of cells started after 3–4 h of exposure. Microalgae were less susceptible to activity of phlorotannin extracts, with the highest MIC values (≥200 µg/mL) measured for Chlorella vulgaris cells. D. aculeata, E. siliculosus, and three fucalean algae accumulate considerable amounts (4–16% of dry weight) of phlorotannins with MIC values similar to those widely used antibiotics. As these species grow abundantly in polar and temperate seas and have considerable biomass, they may be regarded as promising sources of phlorotannins. Full article
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