Temporal variation in chemical composition of Dictyota dichotoma (Hudson) J.V. Lamouroux (Dictyotales, Phaeophyceae) from Red Sea Coast, Egypt

Deyab, Mohamed A.; El-Katony, Taha Mohamed; El-Adl, Magda F.; Ward, Fatma Mohamed Elnabawy

doi:10.12980/jclm.5.2017j7-3

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…It is worth noting that the mineral composition of D. dichotoma was previously reported by Deyab et al (2017), stating that macroelements analysis showed high contents of potassium, sodium, calcium, and phosphorous, respectively [ 26 ]. Magnesium was the least-detected macroelement.…”

Section: Discussionmentioning

confidence: 94%

Chemical and Nutritional Profiling of the Seaweed Dictyota dichotoma and Evaluation of Its Antioxidant, Antimicrobial and Hypoglycemic Potentials

et al. 2023

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Seaweed has been known to possess beneficial effects forhuman health due to the presence of functional bioactive components. The n-butanol and ethyl acetate extracts of Dictyota dichotoma showed ash (31.78%), crude fat (18.93%), crude protein (14.5%), and carbohydrate (12.35%) contents. About 19 compounds were identified in the n-butanol extract, primarily undecane, cetylic acid, hexadecenoic acid, Z-11-, lageracetal, dodecane, and tridecane, whereas 25 compounds were identified in the ethyl acetate extract, mainly tetradecanoic, hexadecenoic acid, Z-11-, undecane, and myristic acid. FT-IR spectroscopy confirmed the presence of carboxylic acid, phenols, aromatics, ethers, amides, sulfonates, and ketones. Moreover, total phenolic contents (TPC) and total flavonoid contents (TFC) in ethyl acetate extract were 2.56 and 2.51 mg GAE/g and in n-butanol extract were 2.11 and 2.25 mg QE/g, respectively. Ethyl acetate and n-butanol extracts at a high concentration of 100 mg mL−1 showed 66.64 and 56.56 % inhibition of DPPH, respectively. Antimicrobial activity revealed that Candida albicans was the most susceptible microorganism, followed by Bacillus subtilis, Staphylococcus aureus, and Escherichia coli, whereas Pseudomonas aeruginosa showed the least inhibition at all concentrations. The in vivo hypoglycemic study revealed that both extracts exhibited concentration-dependent hypoglycemic activities. In conclusion, this macroalgae exhibited antioxidant, antimicrobial, and hypoglycemic potentials.

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Section: Discussionmentioning

confidence: 94%

Chemical and Nutritional Profiling of the Seaweed Dictyota dichotoma and Evaluation of Its Antioxidant, Antimicrobial and Hypoglycemic Potentials

et al. 2023

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“…Comparatively, lower content of alginate was obtained from D. dichotoma (8.8±2.12%) and P. pavonica (7.99±2.60%) that belong to the order Dictyotales. [14]. The difference in the yield could be attributed to the longer extraction time (3 hrs) and the high temperature (100º C) employed during the extraction of the Egyptian species or to the acidic treatment of the algal mass before extraction.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Native Alginates of Common Alginophytes from the Red Sea Coast of Sudan

Osman

Suliman

Osman

2020

International Journal of Secondary Metabolite

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The objective of this investigation was to investigate the content, viscosity, and major functional groups of the native alginates extracted from 4 alginophytes collected from the Red Sea coast of Sudan in order to evaluate the quality of the polymer for potential applications. The content of the polymer ranged from 7.99±2.60% to 19.1±1.62% based on dry weight in the 4 seaweeds. The peak characteristics of the major functional groups of alginates were identified between 3469.70 cm-1 to 451.31 cm-1. These peaks specify the presence of hydroxyl (OH), carbonyl (C=O), and carboxyl (COOH) groups, respectively. The M/G ratios of the alginate extracted from the Sudanese brown macroalgae are ≤ 1 indicating that the proportion of guluronic acid is slightly greater than the mannuronic acid. The alginate with highest viscosity was that of Padina pavonica (Linnaeus) Thivy (190.7±1.14 mPa.s) followed by Dictyota dichotoma (Hudson) J.V.Lamouroux (146.96±1.2 mPa.s), Turbinaria ornata (Turner) J.Agardh (140.1±1.14 mPa.s), and Hormophysa cuneiformis (J.F.Gmelin) P.C.Silva (109±0.6 mPa.s). The values of the parameters of the native alginates extracted from the Sudanese macroalgae are comparatively in conformity with values reported for some species from similar geographical regions. These values indicated that the present biopolymer is of a potential with regard to pharmaceutical and industrial applications.

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“…It has been reported that marine macroalgae contain 50–60% of carbohydrates [ 45 ] and carbohydrate levels in different Dictyota species vary between 10.8 to 54.2% of dry weight [ 6 ]. Deyab et al [ 46 ] reported that carbohydrates contributed to 30% of dry D. dichotoma biomass, followed by 11.1% of proteins and only 1.3% of total lipids. Additionally, Martins et al [ 47 ] analyzed 24 macroalgae, and carbohydrate content for D. menstrualis was around 250 mg/g DW, 3-fold lower than the results obtained for both D. dichotoma and D. fasciola .…”

Section: Discussionmentioning

confidence: 99%

“…Chemical analysis of less polar fractions (F4) of both macroalgae D. dichtoma and D. fasciola by implementing all three mentioned methods revealed the presence of pheophytin a, a known chlorophyll a derivative. Deyab et al [ 46 ] reported chlorophyll a as the most represented pigment (55% of the total pigment content) in D. dichotoma . Herein, chlorophyll a was present in F4 fractions of both algae, and it was 3.25-fold higher for D. dichotoma than for the D. fasciola F4 sample.…”

Section: Discussionmentioning

confidence: 99%

Intra-Species Variations of Bioactive Compounds of Two Dictyota Species from the Adriatic Sea: Antioxidant, Antimicrobial, Dermatological, Dietary, and Neuroprotective Potential

et al. 2023

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The marine environment has a significant impact on life on Earth. Organisms residing in it are vital for the ecosystem but also serve as an inexhaustible source of biologically active compounds. Herein, the biodiversity of two brown seaweeds, Dictyota dichotoma and Dictyota fasciola from the Adriatic Sea, was evaluated. The aim of the study was the determination of differences in compound composition while comparing their activities, including antioxidant, antimicrobial, and enzyme inhibition, in connection to human digestion, dermatology, and neurological disorders. Chemical analysis revealed several terpenoids and steroids as dominant molecules, while fucoxanthin was the main identified pigment in both algae. D. dichotoma had higher protein, carbohydrate, and pigment content. Omega-6 and omega-3 fatty acids were identified, with the highest amount of dihomo-γ-linolenic acid and α-linolenic acid in D. dichotoma. Antimicrobial testing revealed a dose-dependent inhibitory activity of methanolic fraction against Escherichia coli and Staphylococcus aureus. Moderate antioxidant activity was observed for both algae fractions, while the dietary potential was high, especially for the D. fasciola dichloromethane fraction, with inhibition percentages of around 92% for α-amylase and 57% for pancreatic lipase at 0.25 mg/mL. These results suggest that Dictyota species might be a potent source of naturally derived agents for obesity and diabetes.

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Temporal variation in chemical composition of Dictyota dichotoma (Hudson) J.V. Lamouroux (Dictyotales, Phaeophyceae) from Red Sea Coast, Egypt

Cited by 10 publications

References 18 publications

Chemical and Nutritional Profiling of the Seaweed Dictyota dichotoma and Evaluation of Its Antioxidant, Antimicrobial and Hypoglycemic Potentials

Chemical and Nutritional Profiling of the Seaweed Dictyota dichotoma and Evaluation of Its Antioxidant, Antimicrobial and Hypoglycemic Potentials

Characterization of Native Alginates of Common Alginophytes from the Red Sea Coast of Sudan

Intra-Species Variations of Bioactive Compounds of Two Dictyota Species from the Adriatic Sea: Antioxidant, Antimicrobial, Dermatological, Dietary, and Neuroprotective Potential

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