Exploration of the in-vitro antibacterial-antioxidant potentials and GC-MS metabolite profiling of seaweeds from the southwest coast of India

Botanica Marina, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract The present study elucidates the bioactive metabolites, antioxidants, and antibacterial potential of selected seaweeds – Kappaphycus alvarezii , Caulerpa chemnitzia Sargassum tenerrimum collected from southwest coast India. Biomolecules were extracted using six solvents: hexane, dichloromethane, ethyl acetate, acetone, methanol, ethanol. Among these, ethanol proved to be most efficient extraction solvent. Notably, ethanolic extract S . exhibited high phenolic flavonoid contents, contributing its potent antioxidant properties. In contrast, extracts C rich in tannins, demonstrating marked activity. Gas Chromatography-Mass Spectrometry profiling identified approximately 42 compounds with antimicrobial, antioxidant, anticancer, antidiabetic, cardioprotective Key included stigmasta-5, 24(28)-dien-3-ol (3β, 24Z), cholesterol margarate, arachidonic acid, squalene, 1-hexadecanol, δ-tocopherol, all which hold significant nutraceutical cosmetic value. Furthermore, susceptibility tests against nine bacterial strains revealed that K was particularly effective gram-positive bacteria, while showed considerable efficacy both gram-negative strains.

Язык: Английский

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Reproductive traits of floating Ulva prolifera sporophytes and gametophytes and their contribution to the Yellow Sea green tide

Marine Pollution Bulletin, Год журнала: 2025, Номер 214, С. 117752 - 117752

Опубликована: Март 5, 2025

Язык: Английский

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The role of microbiota in kelp gametophyte development and resilience to thermal stress

Journal of Phycology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Ocean warming is driving profound changes in the ecology of marine habitat formers such as kelps, with negative implications for biodiversity and ecosystem services they support. Thermal stress can disturb associated microbiota that are essential to healthy functioning kelp, but little known about how this process influences early‐life stages. Because kelps have a biphasic life cycle, thermal dynamics adult sporophyte may not reflect those free‐living haploid gametophyte. We investigated role microbial disruption under on gametophytes kelp Ecklonia radiata compared gametophyte microbiota. The changed significantly when microbiome was disrupted increased temperature (26°C), which putative generalist bacterial taxa proliferated families nitrogen fixation decreased. Concurrently, survival decreased <10%, surviving did become fertile disrupted. length both stress. Taken together, suggests important their survival, fertility, response warming. Gametophyte parental were also distinct from water column each other, suggesting vertical transmission one stage next. This study furthers our understanding tolerance well acquisition microbiota, prove vital protecting increasing resilience these foundation species.

Язык: Английский

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Algal Growth and Morphogenesis-Promoting Factors Released by Cold-Adapted Bacteria Contribute to the Resilience and Morphogenesis of the Seaweed Ulva (Chlorophyta) in Antarctica (Potter Cove)

Journal of Plant Growth Regulation, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Abstract Macroalgae are found in a variety of marine vegetation ecosystems around the world, contributing significantly to global net primary production. In particular, sea lettuce species, i.e., members genus Ulva (Chlorophyta), located many ecological niches and characterized by excellent adaptability environmental changes but depend on essential associated bacteria, which release algal growth morphogenesis-promoting-factors (AGMPFs). Our work investigated hypothesis that bacteria need be stress-adapted provide sufficient amounts AGMPFs for morphogenesis throughout its life cycle, even under severe conditions. study thus aimed understand contribute overcoming stressors polar regions. Green macroalgae were collected from Potter Cove, King George Island (Isla 25 de Mayo), Antarctica, microbiome and, subsequently, identify releasing bacteria. Therefore, analysis was combined with morphogenetic bioassays chemical analysis, identifying Antarctic Hereby, axenic cultures compressa (cultivar mutabilis , Ria Formosa, Portugal), previously developed as model system bacteria-induced morphogenesis, inoculated freshly isolated cultivable determine their activity. The exploratory investigation identified numerous cold-adapted AGMPF-producing Unlike temperate-adapted bacterial strains originally U. holobiont, isolates Maribacter sp. BPC-D8 Sulfitobacter BPC-C4 released AGMPFs, such thallusin still unknown compounds, necessary at 2 °C. results illustrate role mediators provided cross-kingdom interactions cold conditions within aquatic systems. newly will enable further functional studies resilience holobiont might applied aquaculture adverse highlights importance eco-physiological assays analysis.

Язык: Английский

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Marine macrophytes in a changing world: mechanisms underpinning responses and resilience to environmental stress – an introduction to a Virtual Issue

New Phytologist, Год журнала: 2024, Номер 244(5), С. 1675 - 1677

Опубликована: Ноя. 6, 2024

This Editorial introduces the Virtual Issue ‘Marine macrophytes in a changing world: mechanisms underpinning responses and resilience to environmental stress’ that includes following papers: Campbell et al . (2018), Collier Ferreira (2014), Jung (2023), Konotchick (2013), Litsi‐Mizan McIntire & Fajardo Murúa (2020), Pedersen (2016), Saha (2024), Schmidt (2021), Smale Viana (2019). Access at www.newphytologist.com/virtualissues

Язык: Английский

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Taxonomic and Functional Dynamics of Bacterial Communities During Drift Seaweed Vermicomposting

Microorganisms, Год журнала: 2024, Номер 13(1), С. 30 - 30

Опубликована: Дек. 27, 2024

Seaweed is a valuable natural resource, but drift or beach-cast seaweed considered waste product. Although traditionally used as an organic amendment, vermicomposting has the potential to transform material into fertilizer, thereby enhancing its microbial properties. This study aimed investigate dynamics of taxonomic and functional bacterial communities in during process by high-throughput sequencing 16S rRNA gene amplicons. Vermicomposting changed composition communities, indicated low proportion taxa common raw vermicompost (21 56 ASVs from more than 900 per sample type). The observed increase diversity (32% mean across sampling times) also affected functionality present vermicompost. diverse community showed enriched pathways related soil health plant growth, including synthesis antibiotics, amino acids, phytohormones, well degradation bisphenol. In conclusion, terms load diversity, derived fertiliser itself.

Язык: Английский

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Phylogeny and ecology of the green seaweed Ulva. Part II

Botanica Marina, Год журнала: 2024, Номер unknown

Опубликована: Дек. 29, 2024

Язык: Английский

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