Economically important red algae resources along the Chinese coast: History, status, and prospects for their utilization

Wang, Xulei; He, Linwen; Ma, Yingchao; Li, Huan; Wang, Yongqiang; Xia, Bangmei; Wang, Guangce

doi:10.1016/j.algal.2020.101817

Cited by 50 publications

(24 citation statements)

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“…The agarophyte A . vermiculophyllum can be, as well, a useful tool in the pharmaceutical industry [ 211 ]. Besides agar application in molecular biology techniques and microbiology, the activity of agar as a drug delivery agent has been investigated [ 212 , 213 ].…”

Section: Pharmacological Potential Of the Invasive Seaweedsmentioning

confidence: 99%

Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply

et al. 2020

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The introduction of exotic organisms in marine ecosystems can lead to economic and ecological losses. Globally, seaweeds represent a significant part of these non-indigenous species (NIS), with 407 introduced algal species. Furthermore, the presence of NIS seaweeds has been reported as a major concern worldwide since the patterns of their potential invasion mechanisms and vectors are not yet fully understood. Currently, in the Iberian Peninsula, around 50 NIS seaweeds have been recorded. Some of these are also considered invasive due to their overgrowth characteristic and competition with other species. However, invasive seaweeds are suitable for industrial applications due to their high feedstock. Hence, seaweeds’ historical use in daily food diet, allied to research findings, showed that macroalgae are a source of nutrients and bioactive compounds with nutraceutical properties. The main goal of this review is to evaluate the records of NIS seaweeds in the Iberian Peninsula and critically analyze the potential of invasive seaweeds application in the food industry.

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Section: Pharmacological Potential Of the Invasive Seaweedsmentioning

confidence: 99%

Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply

et al. 2020

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“…The Pyropia life cycle involves a macroscopic leafy thallus phase (gametophyte) and a microscopic filamentous thallus phase (sporophyte) ( Fig. 1) [13]. Due to its great economical, ecological and research value, Pyropia has been recognized as a model seaweed among marine plants [14,15].…”

Section: −mentioning

confidence: 99%

The carbonate concentration mechanism of Pyropia yezoensis (Rhodophyta): evidence from transcriptomics and biochemical data

et al. 2020

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Background Pyropia yezoensis (Rhodophyta) is widely cultivated in East Asia and plays important economic, ecological and research roles. Although inorganic carbon utilization of P. yezoensis has been investigated from a physiological aspect, the carbon concentration mechanism (CCM) of P. yezoensis remains unclear. To explore the CCM of P. yezoensis, especially during its different life stages, we tracked changes in the transcriptome, photosynthetic efficiency and in key enzyme activities under different inorganic carbon concentrations. Results Photosynthetic efficiency demonstrated that sporophytes were more sensitive to low carbon (LC) than gametophytes, with increased photosynthesis rate during both life stages under high carbon (HC) compared to normal carbon (NC) conditions. The amount of starch and number of plastoglobuli in cells corresponded with the growth reaction to different inorganic carbon (Ci) concentrations. We constructed 18 cDNA libraries from 18 samples (three biological replicates per Ci treatment at two life cycles stages) and sequenced these using the Illumina platform. De novo assembly generated 182,564 unigenes, including approximately 275 unigenes related to CCM. Most genes encoding internal carbonic anhydrase (CA) and bicarbonate transporters involved in the biophysical CCM pathway were induced under LC in comparison with NC, with transcript abundance of some PyCAs in gametophytes typically higher than that in sporophytes. We identified all key genes participating in the C4 pathway and showed that their RNA abundances changed with varying Ci conditions. High decarboxylating activity of PEPCKase and low PEPCase activity were observed in P. yezoensis. Activities of other key enzymes involved in the C4-like pathway were higher under HC than under the other two conditions. Pyruvate carboxylase (PYC) showed higher carboxylation activity than PEPC under these Ci conditions. Isocitrate lyase (ICL) showed high activity, but the activity of malate synthase (MS) was very low. Conclusion We elucidated the CCM of P. yezoensis from transcriptome and enzyme activity levels. All results indicated at least two types of CCM in P. yezoensis, one involving CA and an anion exchanger (transporter), and a second, C4-like pathway belonging to the PEPCK subtype. PYC may play the main carboxylation role in this C4-like pathway, which functions in both the sporophyte and gametophyte life cycles.

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“…Harvest schemes were based on available information of current farming practices (e.g. 19,31,[91][92][93][94][95] and optimized for each seaweed group to achieve maximal biomass per harvest based on standard run tests of three harvest schemes: periodic harvesting, periodic harvesting with a biomass threshold, and conditional harvesting (with a dual criteria of a target weight or when death exceeds growth). The test runs also allowed for optimization of the target weight to initiate harvest (10 %, 20 %, 30 %, 40 %, 50 %, or 80 % of B cap ), as well as the percent of biomass removed at each harvest (40 %, 60 %, or 80 % ).…”

Section: Harvestmentioning

confidence: 99%

“…Finally, the number of harvests per year were limited based on documented cultivation practices. The temperate brown and red alga are commonly harvested twice 19 and 6 times a year 93 , respectively, while the tropical brown and red alga are harvested up to 8 times a year 92,96 .…”

Section: Harvestmentioning

confidence: 99%

Biophysical potential and uncertainties of global seaweed farming

Arzeno-Soltero¹,

Frieder²,

Saenz³

et al. 2022

Preprint

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International climate goals require over 5 gigatons/year (Gt/year) of CO2 to be removed from the atmosphere by midcentury. Macroalgae mariculture has been proposed as a strategy for such carbon dioxide removal (CDR). However, the global potential for seaweed cultivation has not been assessed in detail. Here, we develop and use a dynamic seaweed growth model, the Global MacroAlgae Cultivation MODeling System (G-MACMODS), to estimate potential yields of four different types of seaweed worldwide, and test the sensitivity of these estimates to uncertain biophysical parameters under two nutrient scenarios (one in which the surface ocean nutrient budget is unaltered by the presence of seaweed farms, and another in which seaweed harvest is limited by nutrients that are resupplied by vertical transport). We find that 1 Gt of seaweed carbon could be harvested in 0.8% of global exclusive economic zones (EEZs; equivalent to ~1 million km2) if farms were located in the most productive areas, but potential harvest estimates are highly uncertain due to ill-constrained seaweed mortality and nitrogen exudation rates. Our results suggest that seaweed farming could produce climate-relevant quantities of biomass carbon and highlight key uncertainties to be resolved by future research.

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Economically important red algae resources along the Chinese coast: History, status, and prospects for their utilization

Cited by 50 publications

References 50 publications

Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply

Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply

The carbonate concentration mechanism of Pyropia yezoensis (Rhodophyta): evidence from transcriptomics and biochemical data

Biophysical potential and uncertainties of global seaweed farming

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