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Marine Drugs
Special Issues
Metabolites in Marine Planktonic Organisms
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Metabolites in Marine Planktonic Organisms

A special issue of Marine Drugs (ISSN 1660-3397). This special issue belongs to the section "Marine Chemoecology for Drug Discovery".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 6139

Special Issue Editors

Dr. Valeria Di Dato

E-Mail Website1 Website2
Guest Editor
Marine Biotechnology Department, Stazione Zoologica Anton Dohrn, 80121 Naples, Italy
Interests: diatoms; microalgae; molecular biology and biochemistry; bioinformatics; pharmacological and nutraceutical activity
Special Issues, Collections and Topics in MDPI journals
Dr. Ida Orefice

E-Mail Website
Guest Editor
Stazione Zoologica Anton Dohrn, Istituto Nazionale diBiologia, Ecologia e Biotecnologie Marine, Villa comunale, 80121 Napoli, Italy
Interests: diatoms; microalgae; molecular biology and biochemistry; bioinformatics; pharmacological and nutraceutical activity

Special Issue Information

Dear Colleagues,

Planktonic species are a rich source of primary metabolites such as carbohydrate and lipids, thus supporting marine food webs in planktonic and benthic ecosystems, fisheries, aquaculture and, ultimately, biogeochemical cycles through sinking and degradation. Recent multi-omics technologies have revolutionized the way in which living organisms are studied, leading to the identification of numerous bioactive secondary metabolites playing important roles as chemical mediators in algal–algal communication and in allelopathy, microzooplankton and mesozooplankton grazer defense, and prey–predator recognition. However, the biological and ecological role of these molecules in the planktonic network are still unknown. The acquisition of a huge amount of data has, with the support of dedicated software and bioinformatic tools, significantly improved our knowledge and understanding of the adaptation strategies of this important group of microorganisms.

The aim of this Special Issue is to showcase the chemical diversity and functionality of metabolites produced by planktonic organisms in response to different abiotic, physiological, and genetic factors, in addition to highlighting the variety of biological and ecological function they may have on marine organisms. Moreover, we are interested in studies aimed at investigating the production of these metabolites in natural planktonic communities toward better estimating their potential ecological role at sea.

Dr. Valeria Di Dato
Dr. Ida Orefice
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. Marine Drugs is an international peer-reviewed open access monthly 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 2900 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

  • plankton
  • microalgae
  • microbes
  • zooplankton
  • secondary metabolites
  • network interactions
  • gene expression
  • chemical structure
  • genome function
  • NGS

Published Papers (3 papers)

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Research

13 pages, 934 KiB  
Article
Influence of Nutrient Deprivation on the Antioxidant Capacity and Chemical Profile of Two Diatoms from Genus Chaetoceros
by Roberta Frleta Matas, Sanja Radman, Martina Čagalj and Vida Šimat
Mar. Drugs 2024, 22(2), 96; https://doi.org/10.3390/md22020096 - 19 Feb 2024
Viewed by 1110
Abstract
The limited availability of phosphate, nitrogen and silicon in the growth media affects the growth, cellular processes, and metabolism of diatoms. Silicon deficiency primarily affects diatom morphology, while phosphate deficiency reduces the production of nucleic acids and phospholipids. Differences in pigment and protein [...] Read more.
The limited availability of phosphate, nitrogen and silicon in the growth media affects the growth, cellular processes, and metabolism of diatoms. Silicon deficiency primarily affects diatom morphology, while phosphate deficiency reduces the production of nucleic acids and phospholipids. Differences in pigment and protein composition are mainly due to nitrogen deficiency. In this study, Chaetoceros socialis and Chaetoceros costatus were cultured under phosphate, nitrogen, and silicon deprivation conditions. The diatom biomass was collected during the stationary growth phase and extracted with 70% ethanol under ultrasonication. The chemical profiles of the extracts were analyzed by high-performance liquid chromatography with high-resolution mass spectrometry with electrospray ionisation (UHPLC-ESI-HRMS), while the antioxidant capacity was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and oxygen radical absorbance capacity (ORAC) assays. Pigments, fatty acids, sterols, and derivatives were detected in both species. The total phenolic content in the extracts ranged from 46.25 ± 1.08 to 89.38 ± 6.21 mg of gallic acid equivalent (GAE)/L and from 29.58 ± 1.08 to 54.17 ± 1.18 mg GAE/L. for C. costatus and C. socialis, respectively. Antioxidant activity was higher in C. costatus extracts, especially those obtained from nitrogen-deprived media. The results of this study contribute to the existing knowledge and the ongoing efforts to overcome application and commercialization barriers of microalgae for wide-ranging potential in different industries. Full article
(This article belongs to the Special Issue Metabolites in Marine Planktonic Organisms)
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13 pages, 2280 KiB  
Article
Identification of a Shewanella halifaxensis Strain with Algicidal Effects on Red Tide Dinoflagellate Prorocentrum triestinum in Culture
by Victoria Cruz-Balladares, Vladimir Avalos, Hernán Vera-Villalobos, Henry Cameron, Leonel Gonzalez, Yanett Leyton and Carlos Riquelme
Mar. Drugs 2023, 21(9), 501; https://doi.org/10.3390/md21090501 - 21 Sep 2023
Cited by 1 | Viewed by 1177
Abstract
The dinoflagellate Prorocentrum triestinum forms high biomass blooms that discolor the water (red tides), which may pose a serious threat to marine fauna and aquaculture exploitations. In this study, the algicidal effect of a bacterial strain (0YLH) belonging to the genus Shewanella was [...] Read more.
The dinoflagellate Prorocentrum triestinum forms high biomass blooms that discolor the water (red tides), which may pose a serious threat to marine fauna and aquaculture exploitations. In this study, the algicidal effect of a bacterial strain (0YLH) belonging to the genus Shewanella was identified and evaluated against P. triestinum. The algicidal effects on the dinoflagellate were observed when P. triestinum was exposed to cell-free supernatant (CFS) from stationary-phase cultures of the 0YLH strain. After 24 h exposure, a remarkable reduction in the photosynthetic efficiency of P. triestinum was achieved (55.9%), suggesting the presence of extracellular bioactive compounds produced by the bacteria with algicidal activity. Furthermore, the CFS exhibited stability and maintained its activity across a wide range of temperatures (20–120 °C) and pH values (3–11). These findings highlight the algicidal potential of the bacterium Shewanella halifaxensis 0YLH as a promising tool for the environmentally friendly biological control of P. triestinum blooms. Full article
(This article belongs to the Special Issue Metabolites in Marine Planktonic Organisms)
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28 pages, 857 KiB  
Article
Variability in Macro- and Micronutrients of 15 Rarely Researched Microalgae
by Fabian Sandgruber, Annekathrin Gielsdorf, Benjamin Schenz, Sandra Marie Müller, Tanja Schwerdtle, Stefan Lorkowski, Carola Griehl and Christine Dawczynski
Mar. Drugs 2023, 21(6), 355; https://doi.org/10.3390/md21060355 - 09 Jun 2023
Cited by 2 | Viewed by 3452
Abstract
Microalgae have enormous potential for human nutrition, yet the European Commission has authorized the consumption of only eleven species. Strains of fifteen rarely researched microalgae from two kingdoms were screened regarding their nutritional profile and value for human health in two cultivation phases. [...] Read more.
Microalgae have enormous potential for human nutrition, yet the European Commission has authorized the consumption of only eleven species. Strains of fifteen rarely researched microalgae from two kingdoms were screened regarding their nutritional profile and value for human health in two cultivation phases. Contents of protein, fiber, lipids, fatty acids, minerals, trace elements and heavy metals were determined. In the growth phase, microalgae accumulated more arginine, histidine, ornithine, pure and crude protein, Mg, Mn, Fe and Zn and less Ni, Mo and I2 compared to the stationary phase. Higher contents of total fat, C14:0, C14:1n5, C16:1n7, C20:4n6, C20:5n3 and also As were observed in microalgae from the chromista kingdom in comparison to microalgae from the plantae kingdom (p < 0.05). Conversely, the latter had higher contents of C20:0, C20:1n9 and C18:3n3 as well as Ca and Pb (p < 0.05). More precisely, Chrysotila carterae appeared to have great potential for human nutrition because of its high nutrient contents such as fibers, carotenoids, C20:6n3, Mg, Ca, Mn, Fe, Se, Zn, Ni, Mo and I2. In summary, microalgae may contribute to a large variety of nutrients, yet the contents differ between kingdoms, cultivation phases and also species. Full article
(This article belongs to the Special Issue Metabolites in Marine Planktonic Organisms)
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