Seaweed Polysaccharides in Agriculture: A Next Step towards Sustainability

Mamede, M. M. S.; Cotas, João; Bahćevandžiev, Kiril; Pereira, Leonel

doi:10.3390/app13116594

Cited by 18 publications

(6 citation statements)

References 74 publications

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“…As seen in other studies [58], during this resistance process, the plant can have a biochemical response related with the production of phytoalexins and pathogenesis-related (PR) enzymes, such as phenylalanine ammonia-lyase (PAL), peroxidase (POD) and ascorbate peroxidase (AP), by signaling pathways mediated by salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) [59]. This reaction elicits the plant's metabolic pathways and the synthesis of secondary metabolites, like phenolic compounds.…”

Section: Discussionsupporting

confidence: 82%

Seaweed Polysaccharides as a Potential Biostimulant in Turnip Greens Production

Mamede,

Cotas,

Pereira

et al. 2023

Preprint

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Seaweed polysaccharides have been proven to achieve excellent results in plant growth parameters, when compared to synthetic commercial fertilizers. When applied to the soil directly or sprayed on the foliage, seaweed poly- and oligosaccharides can improve plant vigor, increase the uptake of soil nutrients, and protect plants against several abiotic and biotic stresses, by stimulating a plant to produce secondary metabolites and manage its defense pathways. In this study, three different polysaccharides (alginate, agar and carrageenan) were extracted from one brown seaweed, Saccorhiza polyschides, and two red seaweeds, Gracilaria gracilis and Chondrus crispus, respectively, with intention to analyze their impact on growth, development and metabolism of turnip greens (Brassica napus L.) plants. Altogether, the turnip plants treated with the carrageenan solutions of Chondrus crispus showed the best results in improving the crop’s productivity, particularly, λ-carrageenan extracted from the tetrasporophyte generation of Chondrus crispus, which had the highest bioactivity and positive effect in turnip plants among all treatments. λ-carrageenan has shown that can improve plant growth, increase plant’s biomass, and root system, enhance photosynthetic activity and essential soil nutrient uptake.

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Section: Discussionsupporting

confidence: 82%

Seaweed Polysaccharides as a Potential Biostimulant in Turnip Greens Production

Mamede,

Cotas,

Pereira

et al. 2023

Preprint

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“…As seen in other studies [52], during this resistance process, plants can exhibit a biochemical response by enhancing their metabolic pathways and the synthesis of secondary metabolites, like phenolic compounds. These biochemical responses trigger other morphological responses related to nutrient uptake and, consequently, growth and development [53].…”

Section: Discussionmentioning

confidence: 62%

Seaweed Polysaccharides as Potential Biostimulants in Turnip Greens Production

Mamede,

Cotas,

Pereira

et al. 2024

Horticulturae

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Seaweed polysaccharides can act as substitutes for synthetic compounds present in commercial stimulants and fertilizers used in agriculture to improve crop yields and vigor. In this study, three different polysaccharides (alginate, agar, and carrageenan) were extracted from one brown seaweed, Saccorhiza polyschides, and two red seaweeds, Gracilaria gracilis and Chondrus crispus, respectively, and applied to potted turnip greens (Brassica napus L.), with the intention to analyze their impact on plant growth, development, and metabolism. Turnip greens treated with polysaccharides, especially carrageenan of C. crispus, showed the best results in improving the crop productivity in terms of plant length and weight, number of leaves, nutrient and pigment content, and soil fertility compared with turnip greens from the negative control or those treated with a commercial leaf fertilizer. λ-carrageenan extracted from the tetrasporophyte generation of C. crispus had the highest bioactivity and positive effect on turnip greens among all treatments. λ-carrageenan has been shown to improve plant growth; increase the plant’s biomass (plant leaves: CC(T) (40.80 ± 5.11 g) compared to the positive control (15.91 ± 15.15 g)) and root system; enhance photosynthetic activity; increase the uptake of soil nutrients; and protect plants against abiotic and biotic stresses, stimulating the production of secondary metabolites and managing its defense pathways. Seaweed-extracted polysaccharides have the potential to be used in sustainable agriculture.

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“…Carrageenan (Figure 6) is a sulfate polysaccharide, also present in the cell walls of red macroalgae. It has a high molecular weight and is composed of α-1,3-D-galactopyranosyl and β-1,4-D-glucopyranosyl groups bound to residues of 3,6-anhydrogalactose [60]. The three most important types of carrageenan are kappa (κ), iota (ι) and lambda (λ), which differ in the position of ester sulfate groups and the number of anhydrogalactose.…”

Section: Polysaccharides From Macroalgaementioning

confidence: 99%

“…For example, red algae contain sulfate polysaccharides, such as agar and carrageenan, which in various studies [62][63][64] have already verified their ability to inhibit digestive enzymes, namely α-amylase and α-glucosidase, and kappa (κ) iota (ι) lambda (λ) Carrageenan (Figure 6) is a sulfate polysaccharide, also present in the cell walls of red macroalgae. It has a high molecular weight and is composed of α-1,3-D-galactopyranosyl and β-1,4-D-glucopyranosyl groups bound to residues of 3,6-anhydrogalactose [60]. The three most important types of carrageenan are kappa (κ), iota (ι) and lambda (λ), which differ in the position of ester sulfate groups and the number of anhydrogalactose.…”

Section: Polysaccharides From Macroalgaementioning

confidence: 99%

Algae Food Products as a Healthcare Solution

Tavares,

Cotas,

Valado

et al. 2023

Marine Drugs

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Diseases such as obesity; cardiovascular diseases such as high blood pressure, myocardial infarction and stroke; digestive diseases such as celiac disease; certain types of cancer and osteoporosis are related to food. On the other hand, as the world’s population increases, the ability of the current food production system to produce food consistently is at risk. As a result, intensive agriculture has contributed to climate change and a major environmental impact. Research is, therefore, needed to find new sustainable food sources. One of the most promising sources of sustainable food raw materials is macroalgae. Algae are crucial to solving this nutritional deficiency because they are abundant in bioactive substances that have been shown to combat diseases such as hyperglycemia, diabetes, obesity, metabolic disorders, neurodegenerative diseases and cardiovascular diseases. Examples of these substances include polysaccharides such as alginate, fucoidan, agar and carrageenan; proteins such as phycobiliproteins; carotenoids such as β-carotene and fucoxanthin; phenolic compounds; vitamins and minerals. Seaweed is already considered a nutraceutical food since it has higher protein values than legumes and soy and is, therefore, becoming increasingly common. On the other hand, compounds such as polysaccharides extracted from seaweed are already used in the food industry as thickening agents and stabilizers to improve the quality of the final product and to extend its shelf life; they have also demonstrated antidiabetic effects. Among the other bioactive compounds present in macroalgae, phenolic compounds, pigments, carotenoids and fatty acids stand out due to their different bioactive properties, such as antidiabetics, antimicrobials and antioxidants, which are important in the treatment or control of diseases such as diabetes, cholesterol, hyperglycemia and cardiovascular diseases. That said, there have already been some studies in which macroalgae (red, green and brown) have been incorporated into certain foods, but studies on gluten-free products are still scarce, as only the potential use of macroalgae for this type of product is considered. Considering the aforementioned issues, this review aims to analyze how macroalgae can be incorporated into foods or used as a food supplement, as well as to describe the bioactive compounds they contain, which have beneficial properties for human health. In this way, the potential of macroalgae-based products in eminent diseases, such as celiac disease, or in more common diseases, such as diabetes and cholesterol complications, can be seen.

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Seaweed Polysaccharides in Agriculture: A Next Step towards Sustainability

Cited by 18 publications

References 74 publications

Seaweed Polysaccharides as a Potential Biostimulant in Turnip Greens Production

Seaweed Polysaccharides as a Potential Biostimulant in Turnip Greens Production

Seaweed Polysaccharides as Potential Biostimulants in Turnip Greens Production

Algae Food Products as a Healthcare Solution

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