Seaweeds shelter calcifying marine life from acidifying oceans

Seaweeds produce a chemical microenvironment at their surface, providing refuge for calcifying organisms that are in danger from decreasing oceanic pH, shows new analysis revealed within the journal practical Ecology.

CO2 within the atmosphere dissolves directly into the water, lowering the pH and creating it more and more acidic. brown algae and different seaweeds ar system engineers that form their physical and chemical surroundings. [1]

Shading by invasive seaweeds reduces photosynthesis of maerl from the Ría de Vigo (NW Spain)

The overgrowth and shading of many alien species on the ecu seashore are expected to cut back the chemical process of maerl, decreasing its growth and fitness. during this work, 3 shade levels (0, twenty and 50%) were discovered below laboratory conditions to simulate completely different competitive situations probably moving maerl beds. Live people of sargasso muticum and Undaria pinnatifida were placed over maerl cultures, and also the effects of shading were assessed by chlorophyll visible light employing a pulse-modulated visible light watching system. [2]

Component Analysis and Antifungal Activity of the Compounds Extracted from Four Brown Seaweeds with Different Solvents at Different Seasons

The polar and nonionic extracts of Colpomenia sinuosa, Padina shrub, Cystoseira barbata and Sargassum bacciferum vulgare collected throughout spring, summer and season were evaluated for his or her antifungal activities. The phytochemicals of unknown seaweeds were analyzed by gas natural action and mass qualitative analysis (GC/MS). The protoctist extracts were tested for his or her antifungal activities against genus Aspergillus niger, A. flavus, fungus genus parasiticus, fungus utilize and Fusarium solani. Phytochemicals were extracted from the four seaweeds with varied solvents as well as alcohol, ethanol, acetone, chloroform, and dimethyl ether. [3]

Virucidal and Synergistic Activity of Polyphenol-Rich Extracts of Seaweeds against Measles Virus

Although preventable by vaccination, rubeola still causes thousands of deaths among young youngsters worldwide. the invention of recent antivirals could be a smart approach to regulate new outbreaks that cause such death. during this study, we tend to tested the antiviral activity against rubeola virus (MeV) of Polyphenol-rich extracts (PPs) returning from 5 seaweeds collected and cultivated in Mexico. associate MTT assay was performed to work out toxicity impact, and antiviral activity was measured by syncytia reduction assay and confirmed by qPCR. PPs from Ecklonia arborea (formerly Eisenia arborea, Phaeophyceae) and Solieria filiformis (Rhodophyta) showed the very best property Index (SI), >3750 and >576.9 severally. [4]

Antimicrobial Activity of Bacteria Associated with Seaweeds against Plant Pathogens on Par with Bacteria Found in Seawater and Sediments

Aim: we have a tendency to report antimicrobial activities of microorganism related to ten native and one invasive species of seaweeds on par with microorganism found within the saltwater and sediment. microorganism exhibiting antimicrobial activity were phylogenetically analyzed victimization 16S rRNA cistron.

Place and length of Study: Samples of seaweeds, saltwater, and sediments collected at half dozen localities of the south geographical region of Asian nation between Gregorian calendar month 2009 and January 2010 throughout monsoon season.

Methodology: Culturable microorganism in seaweeds (epibiotic and endobiotics), saltwater and sediments were isolated through serial dilutions victimization one.5% ZoBell marine agar (HiMedia, India). microorganism isolates manufacturing antibiotics were known for screening against industrial antibiotics and that they were subjected to morphological, Gram’s staining and organic chemistry studies. [5]

Reference

[1] Seaweeds shelter calcifying marine life from acidifying oceans

Date: March 21, 2018, Source: British Ecological Society (BES) (web link)

[2] Shading by invasive seaweeds reduces photosynthesis of maerl from the Ría de Vigo (NW Spain)

Cobacho SP, Navarro L, Petrol N, Sánchez JM. Shading by invasive seaweeds reduces photosynthesis of maerl from the Ría de Vigo (NW Spain). Botanica Marina. (web link)

[3] Component Analysis and Antifungal Activity of the Compounds Extracted from Four Brown Seaweeds with Different Solvents at Different Seasons

El-Din SM, Mohyeldin MM. Component Analysis and Antifungal Activity of the Compounds Extracted from Four Brown Seaweeds with Different Solvents at Different Seasons. Journal of the Ocean University of China. 2018 Oct 1;17(5):1178-88. (web link)

[4] Virucidal and Synergistic Activity of Polyphenol-Rich Extracts of Seaweeds against Measles Virus

Morán-Santibañez K, Peña-Hernández M, Cruz-Suárez L, Ricque-Marie D, Skouta R, Vasquez A, Rodríguez-Padilla C, Trejo-Avila L. Virucidal and Synergistic Activity of Polyphenol-Rich Extracts of Seaweeds against Measles Virus. Viruses. 2018 Aug 30;10(9):465. (web link)

[5] Virucidal and Synergistic Activity of Polyphenol-Rich Extracts of Seaweeds against Measles Virus

  1. Suvega1 and K. Arunkumar1*

1Marine Algae Research Division, Post Graduate and Research Department of Botany, Alagappa Government Arts and Science College (Alagappa University) Karaikudi-630 003, Sivagangai-DT, India. (web link)

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