Chemical Defense in Marine Organisms 3rd Edition

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 1634

Special Issue Editors

Special Issue Information

Dear Colleagues,

Marine organisms have evolved several mechanisms to survive in extremely different and hostile environments in terms of light, temperature, salinity, pressure, and predation. The harsh chemical and physical conditions of the marine environment have favored the production of a great variety of molecules in marine organisms that are unique in terms of diversity, structural, and functional features. Chemical defenses include not only the production of toxins (e.g., during harmful algal blooms), but also a plethora of defensive metabolites, mainly secondary metabolites, produced after specific external stimuli. These compounds represent a large reservoir of new bioactive compounds with great pharmaceutical potential.

The third edition of the Special Issue “Chemical Defense in Marine Organisms” aims to collect papers with up-to-date findings on the chemical defensive strategies adopted by marine organisms in order to survive, as well as regarding chemical ecology and marine natural products with potential human applications. This Special Issue will also present recent discoveries related to the regulation and activation of biosynthetic pathways for the production of defensive metabolites.

Dr. Chiara Lauritano
Dr. Adrianna Ianora
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

  • defense strategies
  • stress responses
  • toxins
  • secondary metabolites
  • marine organisms
  • enzymatic pathway activation
  • bioactive compounds
  • biotechnological applications

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Published Papers (1 paper)

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Research

21 pages, 5213 KiB  
Article
Metabolomics and Microbiomics Insights into Differential Surface Fouling of Three Macroalgal Species of Fucus (Fucales, Phaeophyceae) That Co-Exist in the German Baltic Sea
by Ernest Oppong-Danquah, Martina Blümel and Deniz Tasdemir
Mar. Drugs 2023, 21(11), 595; https://doi.org/10.3390/md21110595 - 16 Nov 2023
Viewed by 1299
Abstract
The brown algal genus Fucus provides essential ecosystem services crucial for marine environments. Macroalgae (seaweeds) release dissolved organic matter, hence, are under strong settlement pressure from micro- and macrofoulers. Seaweeds are able to control surface epibionts directly by releasing antimicrobial compounds onto their [...] Read more.
The brown algal genus Fucus provides essential ecosystem services crucial for marine environments. Macroalgae (seaweeds) release dissolved organic matter, hence, are under strong settlement pressure from micro- and macrofoulers. Seaweeds are able to control surface epibionts directly by releasing antimicrobial compounds onto their surfaces, and indirectly by recruiting beneficial microorganisms that produce antimicrobial/antifouling metabolites. In the Kiel Fjord, in the German Baltic Sea, three distinct Fucus species coexist: F. vesiculosus, F. serratus, and F. distichus subsp. evanescens. Despite sharing the same habitat, they show varying fouling levels; F. distichus subsp. evanescens is the least fouled, while F. vesiculosus is the most fouled. The present study explored the surface metabolomes and epiphytic microbiota of these three Fucus spp., aiming to uncover the factors that contribute to the differences in the fouling intensity on their surfaces. Towards this aim, algal surface metabolomes were analyzed using comparative untargeted LC-MS/MS-based metabolomics, to identify the marker metabolites influencing surface fouling. Their epiphytic microbial communities were also comparatively characterized using high-throughput amplicon sequencing, to pinpoint the differences in the surface microbiomes of the algae. Our results show that the surface of the least fouling species, F. distichus subsp. evanescens, is enriched with bioactive compounds, such as betaine lipids MGTA, 4-pyridoxic acid, and ulvaline, which are absent from the other species. Additionally, it exhibits a high abundance of the fungal genera Mucor and Alternaria, along with the bacterial genus Yoonia-Loktanella. These taxa are known for producing antimicrobial/antifouling compounds, suggesting their potential role in the observed fouling resistance on the surface of the F. distichus subsp. evanescens compared to F. serratus and F. vesiculosus. These findings provide valuable clues on the differential surface fouling intensity of Fucus spp., and their importance in marine chemical defense and fouling dynamics. Full article
(This article belongs to the Special Issue Chemical Defense in Marine Organisms 3rd Edition)
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