Seasonal variation of nutritional and antioxidant properties of different Kappaphycus alvarezii strains (Rhodophyta) farmed in Brazil

Araújo, Patrícia Guimarães; Nardelli, Allyson E.; Duran, Reina; Pereira, M. S.; Gelli, Valéria Cress; Mandalka, Andrea; Eisner, Peter; Fujii, Mutuê T.; Chow, Fungyi

doi:10.1007/s10811-022-02739-6

Cited by 17 publications

(4 citation statements)

References 46 publications

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“…Indeed, seasonality seems to be a relevant factor in the de nition of the content of phenolics in the algal biomass investigated, mostly under mild temperatures over the winter and early spring, especially in the freeze-dried samples (Table 1). These data agree as to the seasonality effect with previous ndings of Araújo et al (2022), where higher phenolics contents in green and red phenotypes of K. alvarezii grown in n southeastern Brazil were recorded in summer and autumn. Thus, the season of seaweed harvest can impact on the content of those bioactive compounds, eventually affecting the intended quality of the raw material for a given industrial application.…”

Section: Resultssupporting

confidence: 92%

Effect of drying biomass protocols on bioactive compounds, antioxidant and enzymatic activities of the red macroalga Kappaphycus alvarezii

Nunes,

Dutra,

Brito

et al. 2024

Preprint

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Kappaphycus alvarezii is a red seaweed widely used throughout the world, with applications in various biotechnological processes. In this sense, the contents and stability of bioactive compounds of interest synthesized by this seaweed species must be guaranteed in post-harvest, by adopting suitable drying protocols of biomass (e.g.) that allow furnishing high-quality raw material for industrial usage. This study aimed to analyze the influence of commonly used drying methods, i.e., freeze-drying and oven-drying, on the total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity (FRAP and DPPH assays), total carotenoid content (TC), and lipase (LA) and protease activities (PA) of K. alvarezii samples collected over the seasons in sea farms in southern Brazil. The freeze-drying technique showed to be more effective regarding superior contents of TPC and TC, besides antioxidant activity (DPPH assay). In its turn, oven-drying proved to be the best method regarding the TFC and PA, with better performance in the FRAP assay. In this way, it appears that the drying process of the algal biomass can be selected depending on the required traits of the biomass for the intended industrial application.

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Section: Resultssupporting

confidence: 92%

Effect of drying biomass protocols on bioactive compounds, antioxidant and enzymatic activities of the red macroalga Kappaphycus alvarezii

Nunes,

Dutra,

Brito

et al. 2024

Preprint

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“…In contrast, a higher carbohydrate level was observed in the brown strain. The brown strain also presented the highest antioxidant potential of K. alvarezii for samples collected during the spring [64].…”

Section: Rhodophytamentioning

confidence: 87%

Seaweeds and Corals from the Brazilian Coast: Review on Biotechnological Potential and Environmental Aspects

et al. 2023

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Brazil has a megadiversity that includes marine species that are distributed along 800 km of shoreline. This biodiversity status holds promising biotechnological potential. Marine organisms are important sources of novel chemical species, with applications in the pharmaceutical, cosmetic, chemical, and nutraceutical fields. However, ecological pressures derived from anthropogenic actions, including the bioaccumulation of potentially toxic elements and microplastics, impact promising species. This review describes the current status of the biotechnological and environmental aspects of seaweeds and corals from the Brazilian coast, including publications from the last 5 years (from January 2018 to December 2022). The search was conducted in the main public databases (PubChem, PubMed, Science Direct, and Google Scholar) and in the Espacenet database (European Patent Office—EPO) and the Brazilian National Property Institute (INPI). Bioprospecting studies were reported for seventy-one seaweed species and fifteen corals, but few targeted the isolation of compounds. The antioxidant potential was the most investigated biological activity. Despite being potential sources of macro- and microelements, there is a literature gap regarding the presence of potentially toxic elements and other emergent contaminants, such as microplastics, in seaweeds and corals from the Brazilian coast.

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“…Especially, studies on the biological properties and chemical composition of K. alvarezii have been reported with mixed morphotypes or without any specificity on morphotypes (Ling et al, 2015). Araújo et al (2020) and Araújo et al (2022) reported a specific comparison between green, red, brown and G11 strains in antioxidant properties, and green morphotypes consisting of high antioxidant properties.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Green and Brown Morphotypes of <em>Kappaphycus alvarezii Doty</em> (Doty): Morphology, Total Phenol Content, Antioxidant Activity and Antimicrobial Activity

Rajapaksha,

Gunathilake,

Nirooparaj

et al. 2024

Trop. Agric. Res.

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Kappaphycus alvarezii Doty (Doty), commonly known as elkhorn sea moss, is a popular seaweed cultivated globally. It is a well-known source of carrageenan, which is a thickening agent used in food and other industries. Even though different morphotypes of K. alvarezii are reported globally, it has been cultivated and marketed as a single genotype. However, such information is important, especially to produce high-value products such as nutraceuticals. Therefore, this study aimed to evaluate differences in microscopic structure, antimicrobial and antioxidant properties, and total phenolic contents of green and brown morphotypes of K. alvarezii cultivated in Jaffna, Sri Lanka. Except for the colour, there was no significant difference in macroscopic parameters. There was no significant difference observed in cross-sections under the light microscope. Antimicrobial properties of ethanol, methanol and water extracts were evaluated by disc diffusion assay against, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Antioxidant properties and total phenolic contents were determined using 1, 1- diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay and Folin–Ciocalteau method, respectively. Interestingly, the antibacterial activity, antioxidant properties and total phenolic content of K. alvarezii depend on the morphotype. The green morphotype was rich in total phenolic compounds along with high antibacterial and antioxidant properties. Staphylococcus aureus was the most susceptible bacteria to antimicrobial agents of K. alvarezii and both ethanol and methanol extractions were efficient without significant differences between them in all the assays. The current data suggests better performance of the green morphotype of K. alvarezii as a natural source of antibacterial and antioxidant compounds.

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Seasonal variation of nutritional and antioxidant properties of different Kappaphycus alvarezii strains (Rhodophyta) farmed in Brazil

Cited by 17 publications

References 46 publications

Effect of drying biomass protocols on bioactive compounds, antioxidant and enzymatic activities of the red macroalga Kappaphycus alvarezii

Effect of drying biomass protocols on bioactive compounds, antioxidant and enzymatic activities of the red macroalga Kappaphycus alvarezii

Seaweeds and Corals from the Brazilian Coast: Review on Biotechnological Potential and Environmental Aspects

Comparative Analysis of Green and Brown Morphotypes of <em>Kappaphycus alvarezii Doty</em> (Doty): Morphology, Total Phenol Content, Antioxidant Activity and Antimicrobial Activity

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