Background: Despite the recognized importance, the determination of halogens in Antarctic seaweeds remains understudied. Limited research exists due to challenges associated with sample preparation, and reliable analytical techniques for this type of analysis. Therefore, further investigations are necessary to bridge this knowledge gap and gain a comprehensive understanding of halogen metabolism in Antarctic seaweeds.
Methods: In this study, seaweeds from the coast of the Antarctic continent were characterized concerning the total content of halogens and their species. For this purpose, different sample preparation methods, based on extraction and combustion, combining highly selective and sensitive chromatographic and spectrometric multi-technique approaches were used.
Results: By using optimized methods, it was possible to determine total halogens content, the distribution of bromine and iodine in different classes of species (lipids, water-soluble, proteins, carbohydrates, and residue), as well as the identification of iodinated amino acids (MIT and DIT) in ten brown and red seaweeds. Bromate and iodate were not detected in the samples, which presented only bromide and iodide species in their composition. Additionally, unknown bromine and iodine species were observed in different extracts evaluated. Furthermore, 25 halogenated polyphenols were identified in seaweeds, of which only four were already reported in the literature.
Conclusion: The results obtained in this study comprise unprecedented data in the literature on species of halogens present in seaweeds from the Antarctic environment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jtemb.2024.127396 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effects of pH, Temperature, and Light on the Inorganic Carbon Uptake Strategies in Early Life Stages of (Ochrophyta, Laminariales).
Plants (Basel)
November 2024
Centro i~mar, CeBiB & MASH, Universidad de Los Lagos, Puerto Montt 5400000, Chile.
The responses of seaweed species to increased CO and lowered pH (Ocean Acidification: OA) depend on their carbon concentrating mechanisms (CCMs) and inorganic carbon (Ci) preferences. However, few studies have described these mechanisms in the early life stages of seaweeds or assessed the effects of OA and its interactions with other environmental drivers on their functionality and photophysiology. Our study evaluated the effects of pH, light (PAR), temperature, and their interactions on the Ci uptake strategies and photophysiology in the early stages of .
View Article and Find Full Text PDFEvidence of habitat specificity in sponge microbiomes from Antarctica.
Environ Microbiome
December 2024
GEMA Center for Genomics, Ecology & Environment, Universidad Mayor, Santiago, Chile.
Article Synopsis
- Researchers studied the unique microbial communities in Antarctic sponges compared to those in tropical and temperate regions, focusing on how environmental factors shape these differences.
- The study identified specific microorganisms, like Nitrosomonas oligotropha and Polaribacter, that are unique to Antarctic sponges, suggesting they play vital roles as keystone species in these ecosystems.
- Findings highlight significant habitat-specific patterns in microbial diversity, underscoring the influence of Antarctica's harsh conditions and isolation on sponge microbiomes.
Stable dominance of parasitic dinoflagellates in Antarctic sponges.
PeerJ
November 2024
GEMA Center for Genomics, Ecology & Environment, Universidad Mayor, Santiago, Chile.
Background: Marine sponges are dominant components of Antarctic benthos and representative of the high endemism that characterizes this environment. All microbial groups are part of the Antarctic sponge holobionts, but microbial eukaryotes have been studied less, and their symbiotic role still needs to be better understood. Here, we characterize the dynamics of microbial eukaryotes associated with Antarctic sponges, focusing on dinoflagellates over three summer periods to better understand the members, interannual variations, and trophic and lifestyle strategies.
View Article and Find Full Text PDFLow pharmaceutical pollution of epibenthic organisms from Admiralty Bay, Antarctica (King George Island, South Shetland Islands).
Sci Total Environ
December 2024
Institute of Oceanology Polish Academy of Sciences, ul. Powstańców Warszawy 55, 81-712 Sopot, Poland.
Article Synopsis
- The study investigated the presence of pharmaceutical residues in the benthic organisms of Admiralty Bay, Antarctica, using advanced chemical analysis techniques.
- Among the 22 compounds tested, only caffeine and carbamazepine were found, suggesting low levels of contamination in the bay.
- The findings indicate that local research stations are likely the main source of this pollution and highlight the ability of brown and red macroalgae to accumulate these substances, establishing a baseline for future environmental assessments.
Effect of lead on photosynthetic pigments, antioxidant responses, metabolomics, thalli morphology and cell ultrastructure of Iridaea cordata (Rhodophyta) from Antarctica.
Comp Biochem Physiol C Toxicol Pharmacol
January 2025
Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy.
Over the past decades, the concern about lead pollution in marine environments has increased due to its remarkable toxicity, even at low concentrations. Lead is one of the significant contaminants arising from human activities in Antarctica. However, its effects on polar photosynthetic organisms are poorly known.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!