Seaweeds as a promising resource for blue economy development in Tunisia: current state, opportunities, and challenges

Ktari, L.; Ajjabi, Leila Chebil; Clerck, Olivier De; Gómez‐Pinchetti, Juan Luis; Rebours, Céline

doi:10.1007/s10811-021-02579-w

Cited by 16 publications

(16 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Egyptian coasts of the Mediterranean [ 27 , 28 , 29 ] and Red Sea [ 30 , 31 ] offer a diverse range of wild seaweed genera that may renew and be harvested all year. Despite the Mediterranean having just 0.82% of the world’s ocean’s surface area and 0.32% of its volume, it is the biggest and deepest confined sea and a marine biodiversity hotspot [ 32 , 33 ]. The Mediterranean Sea is home to around 1124 seaweed species, at least 20% of which are indigenous [ 34 , 35 ] and which are represented throughout the year.…”

Section: Introductionmentioning

confidence: 99%

Commercial Seaweed Liquid Extract as Strawberry Biostimulants and Bioethanol Production

Ashour

Al-Souti

Hassan

et al. 2022

Life

View full text Add to dashboard Cite

Seaweeds are increasingly intriguing as a sustainable source of bioactive compounds. They have applications in agriculture, fuels, feed, and food products. To become a cost-competitive product with zero waste, a biorefinery approach is applied, where several products are valorized at the same time. True-Algae-Max (TAM®) has been investigated for its ability to improve the yield and nutritional facts of a strawberry plant. Three concentrations of TAM (0, 50, and 100%) were examined by foliar spray in 2017 with 50% NPK chemical fertilizer. Results indicated that growth, yield, chlorophyll, and potassium content were significantly improved by TAM treatments. TAM50 % resulted in maximum root length, leaf area, plant fresh weight, fruit weight, and yield with an increase ranging from 10 to 110% compared to control. Compared to the NPK control, strawberries grown with TAM50% improved total soluble solids (TSS) from 7.58 to 10.12% and anthocyanin from 23.08 to 29.42 mg CGE 100 g−1. Noteworthily, this reduced total sugar, and total phenolics were boosted by TAM applications, while non-reducing sugar was reduced compared to control. On the other hand, whole seaweed biomass and TAM residuals were used for bioethanol production by acid scarification. The maximum bioethanol yield was observed in residual biomass (0.34 g g−1 dw), while the whole seaweed biomass showed only 0.20 g g−1 dw. These results proved the biorefinery concept of using seaweed extract as a biostimulator and bioethanol production.

show abstract

Section: Introductionmentioning

confidence: 99%

Commercial Seaweed Liquid Extract as Strawberry Biostimulants and Bioethanol Production

Ashour

Al-Souti

Hassan

et al. 2022

Life

View full text Add to dashboard Cite

show abstract

“…It comprises a heterogeneous mixture of two carbohydrates, agarose and agaropectin, which are distributed within the cell wall and intercellular spaces, serving as structural carbohydrates [182]. Agarose, constituting 50-90% of agar, primarily imparts its gelling properties [183,184]. This polysaccharide, characterized by its high molecular weight, consists of multiple (1-3)-β-D-galactopyranosyl-(1-4)-3,6-anhydro-α-L-galactopyranose units.…”

Section: Agarmentioning

confidence: 99%

Cosmeceutical Significance of Seaweed: A Focus on Carbohydrates and Peptides in Skin Applications

Kalasariya,

Maya-Ramírez,

Cotas

et al. 2024

Phycology

View full text Add to dashboard Cite

The term ‘cosmeceutical’ refers to cosmetic products that offer medicinal or drug-like benefits. Marine algae are rich sources of bioactive compounds, particularly carbohydrates and peptides, which have gained attention for their potential in cosmeceuticals. These compounds are abundant, safe, and have minimal cytotoxicity effects. They offer various benefits to the skin, including addressing rashes, pigmentation, aging, and cancer. Additionally, they exhibit properties such as antimicrobial, skin-whitening, anti-aging, antioxidant, and anti-melanogenic effects. This review surveys the literature on the cosmeceutical potentials of algae-derived compounds, focusing on their roles in skin whitening, anti-aging, anticancer, antioxidant, anti-inflammatory, and antimicrobial applications. The discussion also includes current challenges and future opportunities for using algae for cosmeceutical purposes.

show abstract

“…Seaweed farming is a sustainable industry with minimal environmental impact, as it does not require fertilisers or irrigation and does not compete for agricultural land. 1,[5][6][7][8][9] Several products, for various applications, can be extracted from macroalgae including alginate, fucoidan, mannitol, cellulose, proteins, carotenoids, and polyphenols. 10,11 Polyphenols are bioactive compounds synthesised by macroalgae during plant growth and as a response to external stressors such as UV radiation, wounding, and climate.…”

Section: Introductionmentioning

confidence: 99%

“…Macroalgae grow in abundance in their natural habitat and can be both harvested and farmed. Seaweed farming is a sustainable industry with minimal environmental impact, as it does not require fertilisers or irrigation and does not compete for agricultural land 1,5–9 . Several products, for various applications, can be extracted from macroalgae including alginate, fucoidan, mannitol, cellulose, proteins, carotenoids, and polyphenols 10,11 …”

Section: Introductionmentioning

confidence: 99%

Advancing quantification methods for polyphenols in brown seaweeds—applying a selective qNMR method compared with the TPC assay

Wekre

Brunvoll

Jordheim

2022

Phytochemical Analysis

View full text Add to dashboard Cite

Introduction: Brown seaweeds are a sustainable biomass with a potential for various industrial applications. Polyphenols are an important contributor to this potential.Objective: The aim was total quantification of polyphenols in brown seaweeds from different tidal zones, using a selective 1 H quantitative NMR (qNMR) method, comparing the results with the colorimetric Folin-Ciocalteu total phenolic content (TPC) assay.Method: qNMR was performed with integration of selected peaks in the aromatic region (7-5.5 ppm). Deselection of non-polyphenolic 1 H signals was based on information from 2D ( 1 H-13 C, 1 H-15 N) NMR spectra. 13 C NMR phlorotannin characterisation facilitated the average number of protons expected to be found per aromatic ring used for the 1 H quantification.Results: Selective qNMR and the TPC assay showed similar results for the three sublittoral growing species from the Laminariaceae; lower amounts for Laminaria hyperborea and Laminaria digitata (qNMR: 0.4%-0.6%; TPC: 0.6%-0.8%, phloroglucinol equivalents (PGE), dry weight (DW)) and higher amounts for Saccharina latissima (qNMR: 1.2%; TPC: 1.5%, PGE, DW). For the eulittoral Fucaceae, Fucus vesiculosus (qNMR: 1.1%; TPC: 4.1%; PGE, DW) and Ascophyllum nodosum (qNMR: 0.9%; TPC: 2.0%; PGE, DW), the TPC results were found to be up to three times higher than the qNMR results. The 13 C NMR characterisation showed the highest phlorotannin polymerisation degree for F. vesiculosus. Conclusion:The TPC assay provided similar polyphenolic amounts to the selective qNMR method for sublittoral species. For eulittoral growing species, the TPC method showed amounts up to three times higher than the qNMR method-most likely illustrating the lack of selectivity in the TPC assay.

show abstract

Seaweeds as a promising resource for blue economy development in Tunisia: current state, opportunities, and challenges

Cited by 16 publications

References 99 publications

Commercial Seaweed Liquid Extract as Strawberry Biostimulants and Bioethanol Production

Commercial Seaweed Liquid Extract as Strawberry Biostimulants and Bioethanol Production

Cosmeceutical Significance of Seaweed: A Focus on Carbohydrates and Peptides in Skin Applications

Advancing quantification methods for polyphenols in brown seaweeds—applying a selective qNMR method compared with the TPC assay

Contact Info

Product

Resources

About