Characteristics and function of an extracellular polysaccharide from a green alga Parachlorella

Sasaki, Mitsuki; Takagi, Akari; Sasaki, Daisaku; Nakamura, Akihiro; Asayama, Munehiko

doi:10.1016/j.carbpol.2020.117252

Cited by 25 publications

(19 citation statements)

References 20 publications

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“…Comparing our findings with previous research, the total polysaccharide yield with respect to biomass in this study was higher than that of most other water and organic extracts, such as Nannochloropsis oculata at 19% w / w [ 6 ]; Ulva lactuca at 26.01–28.29% w / w [ 5 ]; Parachlorella spp. at 73.8% w / w [ 26 ]; Chondrus verrucosus at 46.2–65.9% w / w [ 27 ]; and Nostoc commune at 82.2–84.6% w / w [ 28 ]. The results of this study suggest the feasibility of using C. microphysa as a cash crop to produce polysaccharides.…”

Section: Resultsmentioning

confidence: 99%

Extraction Procedure, Characteristics, and Feasibility of Caulerpa microphysa (Chlorophyta) Polysaccharide Extract as a Cosmetic Ingredient

2021

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The green alga Caulerpa microphysa, which is native to Taiwan, has a relatively high economic value and a well-developed culture technique, and is used mainly as a foodstuff. Its extract has been shown to exhibit antitumor properties, but the polysaccharide content of the extract and its anti-inflammatory and wound-healing effects and moisture-absorption and -retention capacity remain unknown. Hence, the objective of this study was to evaluate the potential of the polysaccharides in C. microphysa extract (CME) for use in cosmetics. The overall polysaccharide yield from the CME was 73.93% w/w, with four molecular weight fractions. The polysaccharides comprised 59.36 mol% mannose, 27.16 mol% glucose, and 13.48 mol% galactose. In addition, the CME exhibited strong antiallergic, wound-healing, transdermal-delivery, and moisture-absorption and -retention effects. In conclusion, the results suggested that CME potentially has anti-inflammatory and wound-healing effects and a good moisture capacity, which can be used in cosmetic applications.

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Section: Resultsmentioning

confidence: 99%

Extraction Procedure, Characteristics, and Feasibility of Caulerpa microphysa (Chlorophyta) Polysaccharide Extract as a Cosmetic Ingredient

2021

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“…Third, PS might also possess stress resistance characteristics apart from serving as energy sources. Sasaki et al demonstrated that the PS from Parachlorella exhibited resistance to stress conditions (e.g., ultraviolet rays, heat, dryness, and decompression) . However, the underlying PS-involved stress defense mechanism is obscure and requires more investigation.…”

Section: Discussionmentioning

confidence: 99%

“…Sasaki et al demonstrated that the PS from Parachlorella exhibited resistance to stress conditions (e.g., ultraviolet rays, heat, dryness, and decompression). 38 However, the underlying PS-involved stress defense mechanism is obscure and requires more investigation. Overall, PN and PS with multiple functions would be overproduced to defend against the HL condition.…”

Section: Discussionmentioning

confidence: 99%

Enhanced Secretions of Algal Cell-Adhesion Molecules and Metal Ion-Binding Exoproteins Promote Self-Flocculation of Chlorella sp. Cultivated in Municipal Wastewater

Chen

Qiu

et al. 2021

Environ. Sci. Technol.

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The mechanism of self-flocculation remains unclear, partially impeding its efficiency enhancement and commercial application of microalgae-based municipal wastewater (MW) bioremediation technology. This study revealed the contributions of exoproteins [PN, proteins in extracellular polymeric substances (EPS)] to the separation of indigenous microalgae from treated MW. Compared to the low light intensity group, the high light intensity (HL) group produced Chlorella sp. with 4.3-fold higher self-flocculation efficiencies (SE). This was attributed to the enriched biological functions and positional rearrangement of increased PN within 2.9-fold higher EPS. Specifically, a total of 75 PN was over-expressed in the HL group among the 129 PN identified through label-free proteomics. The algal cell-adhesion molecules (Algal-CAMs) and metal-ion-binding PN were demonstrated as two dominant contributors promoting cell adhesion and bridging, through function prediction based on the contained domains. The modeled 3D structure showed that Algal-CAMs presented less hydrophilic α-helix abundance and were distributed in the outermost position of the EPS matrix, further facilitating microalgal separation. Moreover, the 10.1% lower hydrophily degree value, negative interfacial free energy (−19.5 mJ/m2), and 6.8-fold lower energy barrier between cells also supported the observed higher SE. This finding is expected to further fill the knowledge gap of the role of PN in microalgal self-flocculation and promote the development of biomass recovery from the microalgae-wastewater system.

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“…In recent years, local eutrophication has been caused in the water of Huanglong travertine deposition, 7 which is conducive to the growth of algae. Algae in Huanglong water play a landscape coloring role, and their activity promotes the deposition of CaCO 3 .…”

Section: Introductionmentioning

confidence: 99%

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

Gao

Zhang

Sun³

et al. 2023

ACS Earth Space Chem.

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Travertine deposits are formed after CO2 is degassed from deep karst water at the Huanglong Scenic Area, a World Natural Heritage Site. In recent years, various levels of eutrophication have occurred in travertine waters, resulting in large areas of algal mats that have severely affected the continued deposition of travertine and its appreciable value. The research on hydrochemical types, hydrochemical components, and pollution characteristics of surface water and groundwater in Huanglong National Scenic Area, a World Natural Heritage, is beneficial to the evaluation and management of regional water resources and landscape development. In June 2022, 14 groups of surface water and groundwater samples were collected from Huanglong. Mathematical statistics were used to analyze the water’s chemical characteristics, the Piper three-plot was used to analyze the water’s chemical types, and Gibbs and Gaillardet model were used to discuss the sources and influencing factors of main ions in surface water. The eutrophication degree of regional water was evaluated by the single factor index method. The results show that most of the groundwater in the study area belongs to weakly alkaline water. The cations are mainly Ca2+, the anions are mainly HCO3 –, and the hydrochemical type is HCO3–Ca. The major contribution of TDS comes from Ca2+ and HCO3 –. According to the analysis of water–rock model, the hydrochemical origin of surface water in the study area is mainly controlled by rock weathering, and most ions are influenced by the water–rock interaction of carbonate rocks, with the existence of reverse cation exchange. The spatial and temporal distribution characteristics of nitrogen, phosphorus, and carbon are obvious. Eutrophication evaluation showed that Huanglong was in a medium eutrophication state.

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Characteristics and function of an extracellular polysaccharide from a green alga Parachlorella

Cited by 25 publications

References 20 publications

Extraction Procedure, Characteristics, and Feasibility of Caulerpa microphysa (Chlorophyta) Polysaccharide Extract as a Cosmetic Ingredient

Extraction Procedure, Characteristics, and Feasibility of Caulerpa microphysa (Chlorophyta) Polysaccharide Extract as a Cosmetic Ingredient

Enhanced Secretions of Algal Cell-Adhesion Molecules and Metal Ion-Binding Exoproteins Promote Self-Flocculation of Chlorella sp. Cultivated in Municipal Wastewater

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

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