Antioxidant properties of different strains of <i>Kappaphycus alvarezii</i> (Rhodophyta) farmed on the Brazilian coast

Araújo, Patrícia Guimarães; Nardelli, Allyson E.; Fujii, Mutuê T.; Chow, Fungyi

doi:10.1080/00318884.2020.1736878

Cited by 27 publications

(20 citation statements)

References 32 publications

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“…The extract yields obtained in this study with hexane, dichloromethane and ethyl acetate were low (lower than 1%) when compared to methanolic and aqueous extracts, which justifies our targeting with these last one's extracts. Similar results were obtained by Araújo et al (2020) studying the red macroalga Kappaphycus alvarezii (Doty) Doty ex P.C. Silva.…”

Section: Discussionsupporting

confidence: 83%

Caracterização química, potencial antioxidante e atividade biológica de macroalgas arribadas do litoral brasileiro

Harb¹

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A wide variety of metabolites extracted from macroalgae is currently used as functional food ingredients, natural nutraceuticals, biomedical materials, cosmetic formulations, as well as in other products that promote human health. One of the major limitations in the search for new extracts or natural products with biological action is the lack of available biomass for studies and even for their bioprospection. In this context, the availability of beach-cast marine algae is a sustainable and highly productive alternative. The main objective of this study was to evaluate the chemical and bioactive potential of extracts from 15 materials of beach-cast marine algae collected from the Brazilian coast to provide subsidies that allow identifying the potentialities and its uses as functional product. The findings showed that the highest antioxidant activities were found in extracts from brown beach-cast algae followed by the extracts of red beach-cast algae, and the lowest activities were detected in the green beach-cast species. The most efficient extracts of beach-cast species with antioxidant properties were from Dictyopteris jolyana, Zonaria tournefortii, and Osmundaria obtusiloba. Regarding antiviral activity, the aqueous extract of Codium isthmocladum and methanolic extracts from D. jolyana, Z. tournefortii Alsidium seaforthii, Spiridia clavata and O. obtusiloba were highly promising, reaching inhibition percentage above 90%. The extracts of Z. tournefortii, A, seaforthii and C. isthmocladum showed high cytotoxicity activity against the tumoral cells strains HL60 (leukemia) and HTC116 (colon) and did not show any cytotoxicity activity against non-tumoral human cells (HGF1). Currently, the large amount of beach-cast seaweeds deposited on the beaches of Brazil is collected and treated as trash, being incinerated or disposed in landfills by the government. Instead of using public resources and making efforts for the removal of this biomass, it is possible to propose different uses for the Brazilian beach-cast seaweeds and transform it into applications for several sectors. Due to the antioxidant, antiviral, nutritional, photoprotective and cytotoxic properties reported for macroalgae, such applied features bring environmental benefits by mitigating coastal pollution generating a usable resource, in addition to ensuring sustainable social and economic development. The review data shown in the literature of Brazilian beach-cast algae shows the relevance and innovation of this study. This is the first report evaluating chemical composition, antioxidant potential, antiviral activity, cytotoxicity potential and photoprotection of extracts from beach-cast algae from the Brazilian coast. The potential of beach-cast seaweeds provides raw-material for several applications, combined with the large amount available on the beaches of certain regions at the Brazilian coast can be better exploited. The present study significantly contributes to increasing knowledge of Brazilian beach-cast algae and their potential uses as well as t...

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Section: Discussionsupporting

confidence: 83%

Caracterização química, potencial antioxidante e atividade biológica de macroalgas arribadas do litoral brasileiro

Harb¹

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“…rubens. In species like Kappaphycus alvarezii barcoded in the present study and the ones occurring in Brazilian coast (Nogueira et al, 2020), various haplotypes were known to contain variable composition of anti-oxidants (Araújo et al, 2020). They were also actively used for the nutrient removal in integrated fish culture systems (Kambey et al, 2020).…”

Section: Dna Barcoding Rhodophyta and Its Utilitymentioning

confidence: 62%

Identifying seaweeds species of Chlorophyta, Phaeophyta and Rhodophyta using DNA barcodes

Prasanthi

PrasannaKumar

Annadurai

et al. 2020

Preprint

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Strengthening the DNA barcode database is important for a species level identification, which was lacking for seaweeds. We made an effort to collect and barcode seaweeds occurring along Southeast coast of India. We barcoded 31 seaweeds species belonging to 21 genera, 14 family, 12 order of 3 phyla (viz., Chlorophyta, Ochrophyta and Rhodophyta). We found 10 species in 3 phyla and 2 genera (Anthophycus and Chnoospora) of Ochrophyta were barcoded for the first time. Uncorrected p-distance calculated using K2P, nucleotide diversity and Tajima’s test statistics reveals highest values among the species of Chlorophyta. Over all K2P distance was 0.36. The present study revealed the potentiality of rbcL gene sequences in identification of all 3 phyla of seaweeds. We also found that the present barcode reference libraries (GenBank and BOLD) were insufficient in seaweeds identification and more efforts were needed for strengthening local seaweed barcode library to benefit rapids developing field such as environmental DNA barcoding. We also show that the constructed barcode library could aid various industrial experts involved in seaweed bio-resource exploration and taxonomy/non-taxonomic researches involved in climate, agriculture and epigenetics research in precise seaweed identification. Since the rise of modern high-throughput sequencing technologies is significantly altering bio-monitoring applications and surveys, reference datasets such as ours will become essential in ecosystem’s health assessment and monitoring.

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“…Reactive oxygen species induce damage to macromolecular structures of the cell, including DNA, proteins, and phospholipids, which can lead to cell apoptosis (Lesser, 2006). As a response to oxidative stress macroalgae produce several antioxidant compounds (Araujo et al, 2020;Borburema et al, 2022b). Thus, the higher photosynthetic activity recorded in B. montagnei (rETR and a as proxies) may be related to the energy expenditure for the biosynthesis of antioxidant defensive compounds.…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress

Borburema

Graiff²,

Marinho‐Soriano³

et al. 2022

Front. Mar. Sci.

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Increased solar radiation on the Earth’s surface is expected due to global change. Mangrove macroalgae can be negatively affected by increased solar radiation, since some species, such as Bostrychia spp. have been characterized as typical “shade” plants. Thus, we investigated the effects of increasing photon flux densities (PFDs: 170, 267, 443, 638, and 1155 µmol photons m–2 s–1) on the physiological performance of Bostrychia calliptera and Bostrychia montagnei from a tropical mangrove. Several photosynthesis–related parameters indicated that both species decreased their photosynthetic performance under increasing PFDs, with photosynthesis of B. montagnei being more affected than that of B. calliptera. Bostrychia calliptera exhibited highest growth under 638 µmol photons m–2 s–1 while at 1155 µmol photons m–2 s–1 it was inhibited. The highest growth of Bostrychia montagnei was observed under 267 µmol photons m–2 s–1. Higher PFDs led to growth inhibition. The phycobiliprotein and chlorophyll a content of B. montagnei was degraded under increased PFDs. In B. calliptera only chlorophyll a degradation was observed. The mycosporine-like amino acid contents (photoprotective metabolites) of both species were degraded under increasing PFDs, which was more pronounced in B. montagnei. Our results demonstrated that increased solar radiation on estuarine tropical ecosystems will be detrimental to the physiological performance of B. calliptera and B. montagnei. Our results also demonstrated that B. montagnei was more negatively affected by increased light stress than B. calliptera. This can explain its preferential occurrence in more shaded microhabitats compared to B. calliptera. Our data document for the first time light acclimation in the studied macroalgae and the deleterious effects of increased light stress on the genus Bostrychia.

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Antioxidant properties of different strains of Kappaphycus alvarezii (Rhodophyta) farmed on the Brazilian coast

Cited by 27 publications

References 32 publications

Caracterização química, potencial antioxidante e atividade biológica de macroalgas arribadas do litoral brasileiro

Caracterização química, potencial antioxidante e atividade biológica de macroalgas arribadas do litoral brasileiro

Identifying seaweeds species of Chlorophyta, Phaeophyta and Rhodophyta using DNA barcodes

Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress

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