Molecular evidence of the presence of <i>Dictyota dichotoma</i> (Dictyotales: Phaeophyceae) in Argentina based on sequences from mtDNA and cpDNA and a discussion of its possible origin

Lopes-Filho, Erick Alves Pereira; Salgueiro, Fabiano; Nascimento, Silvia M.; Gauna, M. Cecilia; Parodi, Elisa R.

doi:10.1080/0028825x.2017.1326387

Cited by 7 publications

(3 citation statements)

References 59 publications

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“…Moreover, identification based on morphology is almost impossible especially when distinctive characteristics are absent (Herroro et al 2010). The identification of Dictyota species is challenging due to their phenotypic plasticity and poor species delineation (Lopes-Filho et al 2017). Likewise, Padina species are also taxonomically challenging due to their phenotypic plasticity coupled with a poor understanding of reliable morphological characters (Win et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Species identification of stranded seaweeds on eastern seashores of Thailand and utilization as a sole carbon source for single cell oils synthesized by oleaginous yeasts

Chantarasiri

2020

Biodiversitas

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Abstract. Chantarasiri A. 2020. Species identification of stranded seaweeds on eastern seashores of Thailand and utilization as a sole carbon source for single-cell oils synthesized by oleaginous yeasts. Biodiversitas 21: 2353-2361. Many stranded seaweeds are left to decompose on the seashore. This study aimed to identify and utilize the stranded seaweeds collected from seashores in Rayong Province on the east coast of Thailand. Seaweeds were identified as Dictyota dichotoma strain A and Padina australis strain B based on their distinctive morphology and 18S rDNA sequence analyses. The most abundant seaweed, D. dichotoma strain A, was analyzed for chemical compositions following AOAC standard methods. This seaweed was considered a low-cost carbon source for the cultivation of three oleaginous yeasts without any other nutrient supplements. All oleaginous yeasts utilized the carbon source from Dictyota medium for growth and accumulation of single-cell oils (SCOs). The oleaginous yeast, Cryptococcus albidus strain TISTR 5103 accumulated SCOs at 51% (w/w). The resulting SCOs from oleaginous yeasts comprise many fatty acids with 10 to 22 carbon atoms. This study is the first to identify stranded seaweeds in Rayong Province using morphological and genetic techniques. Results showed the potential application of stranded seaweeds as a low-cost carbon source for SCO biosynthesis of oleaginous yeasts.

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Section: Discussionmentioning

confidence: 99%

Species identification of stranded seaweeds on eastern seashores of Thailand and utilization as a sole carbon source for single cell oils synthesized by oleaginous yeasts

Chantarasiri

2020

Biodiversitas

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“…from Puerto Deseado (Patagonia, Argentina), where it was present year-round, growing on calcareous algae. There is a high chance that this report corresponds to the entity from Argentina identified as D. dichotoma (Hudson) J. V.Lamouroux by Lopes-Filho et al (2017) using DNA sequence information. Dictyota dichotoma is primarily known from Europe, but is also present in South Africa and the temperate Atlantic coast of Brazil and Argentina (Tronholm et al 2010;O.…”

Section: Introductionmentioning

confidence: 93%

Dictyota falklandica sp. nov. (Dictyotales, Phaeophyceae) from the Falkland Islands and southernmost South America

Kuepper

Peters²,

Kytinou

et al. 2019

Phycologia

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Surveys of the seaweed flora of the Falkland Islands and of Tierra del Fuego revealed the presence of a new species of brown alga. Dictyota falklandica sp. nov. inhabits the shallow rocky infralittoral in sheltered localities and the lower intertidal in more exposed sites. Dictyota falklandica has a regular to irregular habit of dichotomously branched blades, forming erect thalli composed of a single-layered cortex and medulla, with margins in the apical parts dotted with dormant apical cells. Sporangia occur in irregular groups or longitudinal lines on the thallus surface. Molecular phylogenies based on chloroplast psbA and rbcL and mitochondrial cox1 sequences showed that the species from the Falkland Islands is sister to a clade formed by D. korowai, recently described from New Zealand and D. kunthii known from both the Pacific coast of South America and New Zealand. Temperature tolerance experiments, showing mortality at 25°C but survival at 20°C, confirm the cold-temperate affinity of this taxon. Its relationship to other cold-temperate Southern Hemisphere species is discussed, with its closest relatives living in regions with sea surface temperatures of at least 7-10°C higher.

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“…However, the vast quantity of contributions to the systematics and distribution of this group of algae in the SwAO were made between the 1960s and 1980s by A. O. Asensi (reviewed by Boraso de Zaixso & Quartino, 1993). Although molecular taxonomic studies that appeared in the last decade have helped to confirm the identity of some species (Hoshino, Croce, et al, 2020; Küpper et al, 2019; Lopes‐Filho et al, 2017; Mystikou et al, 2016; Poza et al, 2020), many Phaeophyceae taxa from the SwAO remain to be studied by means of molecular studies, as is the case of the genus Scytosiphon .…”

Section: Introductionmentioning

confidence: 99%

Taxonomic study of Scytosiphon (Phaeophyceae) from temperate coasts of Argentina

Croce

Hoshino

Gauna

et al. 2023

Journal of Phycology

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Scytosiphon is a common intertidal genus widely distributed on temperate coasts worldwide. Recently, eight species have been delimited with molecular tools. Although S. lomentaria is the only species that predominates in the macroalgal literature of the Southwestern Atlantic Ocean (SwAO), unpublished molecular data obtained for a population study of S. lomentaria revealed hidden species diversity of Scytosiphon among the individuals collected from four localities at the SwAO. The aim of this study was to revise the identity and phylogenetic relationships of Scytosiphon from temperate coasts of the SwAO using DNA data. Thalli were collected from the Argentinean coast between 39° S and 43° S, from which cox1 and rbcL gene sequences were obtained. Phylogenies and haplotype networks were inferred and morphology of gametophytes was studied. Four species were recognized, S. lomentaria, S. promiscuus, S. shibazakiorum, and one species that belongs to a complex of species known as "Scytosiphon Atlantic complex." This complex was known to occur only in the North Atlantic, however, the results found in this study revealed that it has an extended distribution range that includes the southern hemisphere, where its populations have high genetic diversity and unique haplotypes. The morphological differences among the four species were subtle; denoting that previous Scytosiphon records from the SwAO attributed to the renowned S. lomentaria could represent different species. In addition, sex ratio and genome-wide single nucleotide polymorphisms (SNPs) analyses were done for populations of S. promiscuus presumably introduced to the SwAO, and the results indicated that they included female-dominant parthenogenetic populations, which were probably introduced from Japan.

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Molecular evidence of the presence of Dictyota dichotoma (Dictyotales: Phaeophyceae) in Argentina based on sequences from mtDNA and cpDNA and a discussion of its possible origin

Cited by 7 publications

References 59 publications

Species identification of stranded seaweeds on eastern seashores of Thailand and utilization as a sole carbon source for single cell oils synthesized by oleaginous yeasts

Species identification of stranded seaweeds on eastern seashores of Thailand and utilization as a sole carbon source for single cell oils synthesized by oleaginous yeasts

Dictyota falklandica sp. nov. (Dictyotales, Phaeophyceae) from the Falkland Islands and southernmost South America

Taxonomic study of Scytosiphon (Phaeophyceae) from temperate coasts of Argentina

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