Exploring relationships between seaweeds carrageenan contents and extracted hybrid carrageenan properties in wild and cultivated Mastocarpus stellatus, Chondrus crispus and Ahnfeltiopsis devoniensis.

Azevedo, Gabriela; Torres, M.D.; Almeida, Paulo; Hilliou, L.

doi:10.1016/j.algal.2022.102840

Cited by 6 publications

(7 citation statements)

References 42 publications

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“…This is due to the ease of harvesting the algae, the spatial yield per tank, and the apparent maintenance of the algae characteristics. These results seem to be in line with previous experiments where a daily growth rate between 1 and 2% was registered [62].…”

Section: Discussionsupporting

confidence: 93%

“…As for carrageenan content, there was a notable difference between the optimized aquaculture method tested in carrageenan yield and the wild specimen production. This carrageenan production is in line with the literature, considering that wild seaweed presented higher carrageenan levels than reported in previous works [60][61][62]. Wild seaweed may have higher carrageenan content because there is an accumulation of carrageenan and overproduction as a response to stress, either by physical stress (being an intertidal species, constantly pushed and pulled by the tide) or chemical (nutrient scarcity).…”

Section: Discussionsupporting

confidence: 91%

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Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Tanoeiro¹,

Fortunato

Cotas

et al. 2023

Applied Sciences

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With the notable scarcity of Chondrus crispus on the Portuguese coast, and interest in exploiting compounds such as carrageenan, this study focuses on investigating different aquaculture methods and recording the yield of carrageenan from specimens grown by different methods. We compare the growth of Chondrus crispus in aquaculture using Free Floating, Cages, Attempted Fixation on Rock, and Fixed Line similar to Long Line. The best method was Free Floating where Nursery 0 had a 24-day Specific Growth Rate (SGR) of 2.08 ± 0.47%/day. The worst method in terms of growth was Nursery 2 (Attempted Fixation on Rock) where the SGR at 28 days was 0.33 ± 0.69%/day, and no fixation was observed. In terms of carrageenan extraction, all culture methods gave rise to biomass that had a lower extraction yield than wild specimens, at 50.95 ± 4.10%. However, the Free-Floating method from Nursery 1 showed an acceptable carrageenan content (31.43 ± 7.00%). Therefore, we demonstrate that the concept of C. crispus cultivation may be key to promoting the sustainability and stability of this species.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Tanoeiro¹,

Fortunato

Cotas

et al. 2023

Applied Sciences

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“…It allows for saving resources in the absence of the conventional ethanolic precipitation stage (ethanol: hydrothermal liquid phase, 2.5:1 v/v ) [ 36 ]. It can also involve a reduction in energy consumption (estimated at about 4 × 10 3 kJ) by avoiding the biopolymer drying stage around 24 h [ 37 ], without jeopardizing the rheological features of the obtained gels at comparable ionic strengths [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

Microwave-Assisted Extraction of Carrageenan from Sarcopeltis skottsbergii

et al. 2023

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The development of greener processes for the sustainable utilization of raw materials is increasingly demanded for environmental and economic reasons. A rapid and chemical-free technique was proposed for the extraction of hybrid kappa/iota (6/4) carrageenan from Sarcopeltis (ex Gigartina) skottsbergii. After separation, carrageenans were analyzed by Fourier transform infrared attenuated total reflectance, high-performance size-exclusion chromatography, and rheology. Maximum carrageenan extraction yields up to 63–64% were obtained operating at 110 or at 160 °C, for 5–7 min considering the sum of the heating and cooling periods, but the extraction of the phenolic fraction was favored at 220 °C. The recovered carrageenan showed apparent viscous values around 103 mPa at the lowest tested shear rates (0.1 1/s) and could be suitable to formulate films. Furthermore, those carrageenans obtained under 140 °C showed gel characteristics without previous separation from the liquid extract, avoiding ethanolic precipitation and energy consumption. The antiradical properties correlated with the phenolic content in the liquid phase, but no influence of temperature on the reducing properties was observed. The microwave-assisted hydrothermal treatment could be an efficient tool without needing chemicals for the extraction of carrageenans, which showed adequate rheological properties for commercial uses.

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“…Currently, the Phyllophoraceae includes 16 genera and 129 species and has a worldwide distribution (Guiry & Guiry, 2023). The family is gaining both the attention of evolutionary biologists due to the diverse ecological niches occupied by its species (Sissini et al, 2016) and considerable attention from commercial industries as an abundant source of phycocolloids (Azevedo et al, 2022;Veeragurunathan et al, 2022). The family has a cosmopolitan distribution, covering tropical (Abbott, 1995), subtropical (Kravchenko et al, 2017;Selivanova & Zhigadlova, 2022), and temperate oceans (Newroth, 1971).…”

Section: Introductionmentioning

confidence: 99%

“…Phylogenomic analysis may further our understanding of the origins (Li et al, 2006), evolution (Díaz-Tapia et al, 2019), and recognition of new genera (Qiu et al, 2016) within this diverse and commercially important family. Organellar genomes play a critical role but are limited in number (Boo & Hughey, 2019). Characterizing these genomes is increasingly valuable for comprehensive taxonomy and evolutionary studies (Starko et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Organellar genomic characterization of Anunuuluaehu liula representing a new genus and species of Phyllophoraceae (Gigartinales, Rhodophyta) from the mesophotic zone of Hawai‘i

Cabrera,

Paiano,

Fumo

et al. 2024

Journal of Phycology

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Over the last 2 decades, routine collections in the Hawaiian Archipelago have expanded to mesophotic reefs, leading to the discovery of a new red algal genus and species, here described as Anunuuluaehu liula gen. et sp. nov. This study provides a detailed genus and species description and characterizes chloroplast and mitochondrial organellar genomes. The new genus, Anunuuluaehu, shares many characteristics with the family Phyllophoraceae and shows close similarities to Archestennogramma and Stenogramma, including habit morphology, nemathecia forming proliferations at the outer cortex with terminal chains of tetrasporangia, and carposporophytes with multi‐layered pericarps. The single species in this genus exhibits distinctive features within the Phyllophoraceae: the presence of single‐layer construction of large medullary cells and the development of long, tubular gonimoblastic filaments. Multi‐gene phylogenetic analyses confirmed it as a unique, monophyletic lineage within the family. Cis‐splicing genes, interrupted by intron‐encoded proteins within group II introns, are present in both the chloroplast and mitochondrial genomes of A. liula. Notably, a specific region of the coxI group II intron exhibits similarity to fungal introns. Anunuuluaehu liula is presumed to be endemic to the Hawaiian Archipelago and thus far is known to live solely at mesophotic depths from Hōlanikū to Kaho‘olawe ranging from 54 to 201 m, which is the deepest collection record of any representative in the family. Overall, this study enhances our understanding of the genomic and taxonomic complexities of red algae in mesophotic habitats, emphasizing the significance of continued research in this area to uncover further insights into evolutionary processes and biogeographic patterns.

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Exploring relationships between seaweeds carrageenan contents and extracted hybrid carrageenan properties in wild and cultivated Mastocarpus stellatus, Chondrus crispus and Ahnfeltiopsis devoniensis.

Cited by 6 publications

References 42 publications

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Microwave-Assisted Extraction of Carrageenan from Sarcopeltis skottsbergii

Organellar genomic characterization of Anunuuluaehu liula representing a new genus and species of Phyllophoraceae (Gigartinales, Rhodophyta) from the mesophotic zone of Hawai‘i

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