Antioxidative and antimicrobial activities of intertidal seaweeds and possible effects of abiotic factors on these bioactivities

Xu, Peihang; Tan, Haidong; Jin, Weiguang; Li, Yanfei; Santhosh-Kumar, C.R.; Li, Ping; Liu, Wenhua

doi:10.1007/s00343-019-7046-z

Cited by 15 publications

(8 citation statements)

References 46 publications

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“…Matos et al [ 13 ] also studied the phenolic content of Gelidium sesquispedale using ethanol (86 ± 6 mg GAE/100 g dw) and water (70 ± 6 mg GAE/100 g dw) as solvents; however, the authors did not detail the extraction conditions or method used. Moreover, Xu et al [ 30 ] described a phenolic content of 16.2 ± 1.0 mg GAE/g dry extract using ethanol but applying longer extraction times (24 and 48 h) than in the present study. Therefore, the alternative strategies reported in this study showed clear advantages for the extraction of phenolic and flavonoid compounds from Gelidium sesquipedale using green approaches and eco-friendly solvents in shorter extraction times.…”

Section: Resultsmentioning

confidence: 45%

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Valorization of the Red Algae Gelidium sesquipedale by Extracting a Broad Spectrum of Minor Compounds Using Green Approaches

et al. 2021

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Until now, the red algae Gelidium sesquipedale has been primarily exploited for agar production, leaving an undervalued biomass. In this work, the use of eco-friendly approaches employing ultrasound-assisted extraction (UAE) and green solvents was investigated to valorize the algal minor compounds. The green methods used herein showed an attractive alternative to efficiently extract a broad spectrum of bioactive compounds in short extraction times (15 to 30 min vs. 8 h of the conventional method). Using the best UAE conditions, red seaweed extracts were characterized in terms of total phenolics (189.3 ± 11.7 mg GAE/100 g dw), flavonoids (310.7 ± 9.7 mg QE/100 g dw), mycosporine-like amino acids (MAAs) (Σ MAAs = 1271 mg/100 g dw), and phycobiliproteins (72.4 ± 0.5 mg/100 g dw). Additionally, produced algal extracts exhibited interesting antioxidant and anti-enzymatic activities for potential applications in medical and/or cosmetic products. Thus, this study provides the basis to reach a superior valorization of algal biomass by using alternative methods to extract biologically active compounds following eco-friendly approaches. Moreover, the strategies developed not only open new possibilities for the commercial use of Gelidium sesquipedale, but also for the valorization of different algae species since the techniques established can be easily adapted.

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Section: Resultsmentioning

confidence: 45%

“…Using ethanol and conventional solvent extraction, Xu et al [ 30 ] reported the antioxidant capacity of different seaweeds, including Gelidium sp. collected from the coastline of eastern Guangdong in China.…”

Section: Resultsmentioning

confidence: 99%

Valorization of the Red Algae Gelidium sesquipedale by Extracting a Broad Spectrum of Minor Compounds Using Green Approaches

et al. 2021

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“…Phenolic compounds are a set of secondary metabolites produced by marine macrophytes (algae and seagrasses) with structural, protective and ecological functions [28]. In marine macroalgae, especially intertidal species that are particularly exposed to environmental variability [53], high production and accumulation of TPCs have been observed as a defence function to cope with variations in temperature, salinity, light intensity, depth, pH and other biological factors, such as age, life cycle or herbivore control [33,35,52]. The temporal trend recorded in this study is consistent with these general observations and previous studies on Cystoseira amentacea (old name of E. amentacea) that reported an increase in TPC concentration from winter to spring and summer, as a defence mechanism to minimize damages from high summer temperature and irradiance in sprouting and growing branches [31,50].…”

Section: Discussionmentioning

confidence: 99%

“…Anyway, phenols show high plasticity, responding to other kinds of factors, such as nutrient levels, temperature, salinity, grazing and mechanical wounding [31][32][33][34]. Macroalgae are also naturally rich in fatty acids (FAs), which are a major component of lipids with important antimicrobial and deterrent properties [20,35]. Most of the FAs produced by macroalgae are polyunsaturated fatty acids (PUFAs) that are key components of the cell membrane phospholipids [18].…”

Section: Introductionmentioning

confidence: 99%

Limited Stress Response to Transplantation in the Mediterranean Macroalga Ericaria amentacea, a Key Species for Marine Forest Restoration

Chemello

Signa

Mazzola

et al. 2022

IJERPH

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In the Mediterranean Sea, brown macroalgae represent the dominant species in intertidal and subtidal habitats. Despite conservation efforts, these canopy-forming species showed a dramatic decline, highlighting the urge for active intervention to regenerate self-sustaining populations. For this reason, the restoration of macroalgae forests through transplantation has been recognized as a promising approach. However, the potential stress caused by the handling of thalli has never been assessed. Here, we used a manipulative approach to assess the transplant-induced stress in the Mediterranean Ericaria amentacea, through the analysis of biochemical proxies, i.e., phenolic compounds, lipids, and fatty acids in both transplanted and natural macroalgae over time. The results showed that seasonal environmental variability had an important effect on the biochemical composition of macroalgae, suggesting the occurrence of acclimation responses to summer increased temperature and light irradiance. Transplant-induced stress appears to have only amplified the biochemical response, probably due to increased sensitivity of the macroalgae already subjected to mechanical and osmotic stress (e.g., handling, wounding, desiccation). The ability of E. amentacea to cope with both environmental and transplant-induced stress highlights the high plasticity of the species studied, as well as the suitability of transplantation of adult thalli to restore E. amentacea beds.

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“…These new molecules, which may be biologically active, represent a promising source for scientific research. (Xu et al, 2018). Numerous studies have revealed that these molecules fluctuate mainly according to seasonal cycles (Heavisides et al, 2018;Kumar et al, 2021;Padmakumar & Ayyakkannu, 1997;Stengel et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Seaweed Harvesting for Maximum Antimicrobial Activity: Impact of Seasonal Variation, Temperature, and Salinity

Farid,

Jaatit,

Chennaoui

2024

J. Ecol. Eng.

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Algae are highly adaptable and can thrive in different environments, making them ideal for synthesizing effective and affordable antibacterial compounds. To optimize the harvesting of marine algae and determine the period during which the algae display maximum activity, the effect of seasonal variation (during a closed year) as well as temperature and salinity on the antimicrobial activity of fifteen species of algae (four species belonging to the Chlorophyceae class, two species belonging to the Phaeophyceae class and four species belonging to the Rhodophyceae class) was studied. These algae were tested for their antimicrobial activity against S. aureus, B. cereus, E. coli, and C. neoformens. These observations revealed that the optimal harvesting season for phaeophyceae and rhodophyceae extracts is spring, whereas that for chlorophyceae is during the summer period, when temperature and salinity are at their highest. In this study, it was found that the largest inhibition diameter of algae extracts occurs during summer.

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Antioxidative and antimicrobial activities of intertidal seaweeds and possible effects of abiotic factors on these bioactivities

Cited by 15 publications

References 46 publications

Valorization of the Red Algae Gelidium sesquipedale by Extracting a Broad Spectrum of Minor Compounds Using Green Approaches

Valorization of the Red Algae Gelidium sesquipedale by Extracting a Broad Spectrum of Minor Compounds Using Green Approaches

Limited Stress Response to Transplantation in the Mediterranean Macroalga Ericaria amentacea, a Key Species for Marine Forest Restoration

Optimization of Seaweed Harvesting for Maximum Antimicrobial Activity: Impact of Seasonal Variation, Temperature, and Salinity

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