Concise review of the genus Dictyota J.V. Lamouroux

Bogaert, Kenny A.; Delva, Soria; Clerck, Olivier De

doi:10.1007/s10811-020-02121-4

Cited by 31 publications

(34 citation statements)

References 207 publications

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“…Hörnig et al (1992) merged Dilophus genus in Dictyota, based on morphological features; however, recent phylogenetic results presented by Küpper et al (2019) argued in favor of a genus Dilophus, distinct from Dictyota. At the chemical level, since considerable variation has been observed between samples from the same Dictyota species taken at different localities and during different seasons, it is not possible to draw conclusions whether the chemical content is species-specific (Bogaert et al, 2020), though as fucoxanthin and polyphenols are dependent on environmental conditions including light exposure, the difference in their concentrations in closely related species might be due to differences among habitats (Heriyanto et al, 2017). Indeed, our specimens of D. spiralis and D. fasciola were collected in very shallow waters (less than 1 m) and light-exposed rocks, while D. dichotoma specimens were collected in shadowed rocks, as well as for D. polypodioides and T. atomaria.…”

Section: Fucoxanthin Total Phenolic Content and Dpph Radical-scavenging Capacity Of Dictyotalesmentioning

confidence: 99%

Fucoxanthin and Phenolic Contents of Six Dictyotales From the Tunisian Coasts With an Emphasis for a Green Extraction Using a Supercritical CO2 Method

et al. 2021

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Dictyotales, a common taxonomic group of brown seaweeds found in warm and temperate waters, are known for their richness in bioactive metabolites. In this study, six species of Dictyotales (Dictyopteris polypodioides, Dictyota dichotoma, Dictyota fasciola, Dictyota spiralis, Padina pavonica, and Taonia atomaria) collected from the Tunisian coasts were investigated for their antioxidant potentials, based on their contents of high added-value bioactive metabolites such as fucoxanthin and polyphenols. Fucoxanthin and polyphenols were analyzed quantitatively by high-performance liquid chromatography (HPLC) and UV spectrophotometer, respectively. The antioxidant property of extracts was also determined based on their ability to scavenge 2,2-Diphenyl-1-picrylhydrazyl (DPPH’s) free radical. Thus, the highest concentrations of fucoxanthin were obtained from T. atomaria and D. polypodioides (5.53 ± 1.2 and 3.43 ± 1.3 mg⋅g–1 dry weight, respectively), while the lowest amount was from D. spiralis (0.23 ± 0.1 m mg⋅g–1 dry weight). Dictyota dichotoma and T. atomaria gave the highest total phenol content (19.3 ± 0.4 and 15.2 ± 1.1 mg GAE⋅g–1 dry weight, respectively). In the second step, supercritical carbon dioxide (ScCO2) was used as a green and environmentally safe technique for the extraction of fucoxanthin from the most abundant species D. polypodioides. The extraction of fucoxanthin by ScCO2 allowed an extraction yield ranging from 0.50 ± 0.04% to 1.32 ± 0.02%, with 60°C temperature and 50-MPa pressure as the best extraction conditions. The maximum fucoxanthin and polyphenol recovery in the extract attained 15 and 64%, respectively. The results strengthen the possible use of Dictyotales from the Mediterranean Sea as a promising source of natural ingredients of health and economic interests contributing to Blue Growth in the region.

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Section: Fucoxanthin Total Phenolic Content and Dpph Radical-scavenging Capacity Of Dictyotalesmentioning

confidence: 99%

Fucoxanthin and Phenolic Contents of Six Dictyotales From the Tunisian Coasts With an Emphasis for a Green Extraction Using a Supercritical CO2 Method

et al. 2021

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“…Some regions, including Hawaiian, Caribbean, and Malayan-Indonesian regions, locally consume Dictyota. Its application in the biofuel industry is attributed to its high contents of lipids and fatty acids [7]. Dictyota is also well known due to its high contents of sulfated polysaccharides such as fucans and fucoidans, which are responsible for great therapeutic applications such as immunomodulatory, antitumor, vaccine adjuvant, anti-inflammatory, antiprotozoal, nticoagulant, antiviral, antilipemic, and antimicrobial.…”

Section: Introductionmentioning

confidence: 99%

“…Diterpenes have been of greater interest than other classes in literature survey; thus, Chen et al reviewed diterpenes isolated from the genus Dictyota until 2018. Bogaert et al produced an overview on the taxonomy, anatomy, cytology, genetic data, life history, chemical constituents, nutritional value as well as the economic and ecological significance of Dictyota species [7]. Accordingly, this review concentrates on the published literature relevant to the chemically and pharmacologically diverse biopharmaceuticals isolated from different species of the genus Dictyota during the period from 1976 to now.…”

Section: Introductionmentioning

confidence: 99%

The Biodiversity of the Genus Dictyota: Phytochemical and Pharmacological Natural Products Prospectives

et al. 2022

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Although a broad variety of classes of bioactive compounds have already been isolated from seaweeds of the genus Dictyota, most different species are still chemically and biologically unexplored. Dictyota species are well-known brown seaweeds belonging to the Dictyotaceae (Phaeophyta). The phytochemical composition within the genus Dictyota has recently received considerable interest, and a vast array of components, including diterpenes, sesquiterepenes, sterols, amino acids, as well as saturated and polyunsaturated fatty acids, have been characterized. The contribution of these valued metabolites to the biological potential, which includes anti-proliferative, anti-microbial, antiviral, antioxidant, anti-inflammatory, and anti-hyperpigmentation activities, of the genus Dictyota has also been explored. Therefore, this is the most comprehensive review, focusing on the published literature relevant to the chemically and pharmacologically diverse biopharmaceuticals isolated from different species of the genus Dictyota during the period from 1976 to now.

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“…Dictyota is another common genus of corticated, foliose, brown macroalgae (Dictyotaceae, Ochrophyta) that is also frequently found on tropical and subtropical reefs worldwide (Bogaert, Delva, & De Clerck, 2020; De Clerck et al., 2006). It has a branching morphology that exhibits considerable variability, meaning that species‐level identification in the field is problematic (Bogaert et al., 2020; De Clerck & Coppejans, 1999).…”

Section: Methodsmentioning

confidence: 99%

Why do certain species dominate? What we can learn from a rare case of Microdictyon dominance on a Caribbean reef

Dell

Longo

Manfrino³

et al. 2020

Marine Ecology

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Many Caribbean reefs have shifted from coral dominance to macroalgal dominance, often by brown algae such as Dictyota and Lobophora. However, the north side of Cayman Brac in the Cayman Islands is dominated seasonally by the green macroalga Microdictyon (percent cover of Microdictyon is 4% in the winter and ~40% of the reef in the summer), although it is absent from the south side of the island and the remainder of the country. Indeed, Microdictyon is rare in much of the Caribbean, so this situation on Cayman Brac provides an opportunity to investigate the conditions that facilitate its distribution and dominance. The impact of herbivory, competition, nutrient input and other abiotic conditions were examined as factors that could influence the distribution and dominance of Microdictyon. While herbivory or nutrient input are frequently found to be key drivers of benthic community composition on coral reefs, here consumption of Microdictyon by herbivores was low, and thus, the alga was not subject to strong top-down control by herbivory. So, in this case, neither herbivore abundance nor feeding preference appeared to influence the distribution of Microdictyon. Nutrient input was also similar to both sides of the island suggesting nutrients played little role in differential distribution. But, in a controlled transplant experiment where Microdictyon was protected from herbivory and competition, it experienced almost complete mortality (93.3%) when transplanted to the south side, compared to only 11.8% mortality on the north. The south side was exposed to the strongest wave action 92% of the days in our study and was on average a slight, but significant 0.2°C warmer. Thus, these data suggest physical forcing (i.e. wave exposure) is the most likely factor dictating Microdictyon distribution. Conversely, a combination of reduced herbivory and increased competitive strength may explain the seasonal dominance of Microdictyon on the north side of Cayman Brac. Microdictyon was a competitive inferior to the other common algae in winter but increased in competitive strength to equal other species in summer. These results add to the literature on Microdictyon and on the forces impacting benthic community structure of coral reefs.

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Concise review of the genus Dictyota J.V. Lamouroux

Cited by 31 publications

References 207 publications

Fucoxanthin and Phenolic Contents of Six Dictyotales From the Tunisian Coasts With an Emphasis for a Green Extraction Using a Supercritical CO2 Method

Fucoxanthin and Phenolic Contents of Six Dictyotales From the Tunisian Coasts With an Emphasis for a Green Extraction Using a Supercritical CO2 Method

The Biodiversity of the Genus Dictyota: Phytochemical and Pharmacological Natural Products Prospectives

Why do certain species dominate? What we can learn from a rare case of Microdictyon dominance on a Caribbean reef

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