12 documents found, page 1 of 2
Biogeographic population structure of chimeric blades of porphyra in the northe...
E, Varela-Álvarez; Meirmans, Patrick G.; Guiry, Michael D.; Serrao, EsterThe genus Porphyra sensu lato (Bangiaceae, Rhodophyta), an important seaweed grown in aquaculture, is the most genetically diverse group of the Class Bangiophyceae, but has poorly understood genetic variability linked to complex evolutionary processes. Genetic studies in the last decades have largely focused on resolving gene phylogenies; however, there is little information on historical population biogeograph...
Physiological potential of the chlorophyte Caulerpa prolifera for proliferation...
Olivé, Irene; E, Varela-Álvarez; Silva, João; Serrao, Ester; Santos, RuiOcean warming is altering the metabolic balances of organisms, favouring the expansion of thermo-tolerant individuals. The fast-growing macroalga Caulerpa prolifera is rapidly expanding in the Ria Formosa lagoon (Portugal), a connection area between Mediterranean and Atlantic basins. We investigated the metabolic capacity of C. prolifera to cope with ocean warming, to elucidate its expansion potential. The phot...
Influence of irradiance, dissolved nutrients and salinity on the colour and nut...
Bermejo, Ricardo; Macias, Manuel; Sanchez-Garcia, Fini; Love, Robyn; E, Varela-Álvarez; Hernandez, IgnacioColour is immediately perceived by the consumer and crucial for food product attractiveness. In this study, the possibility of obtaining different colour morphotypes in the rhodophyte Gracilariopsis longissima using short cultivation protocols (i.e. 9 days) was explored. In a first factorial experiment, the effects of salinity (25‰, 35‰ and 45‰), irradiance (60 and 270 μmol photons m− 1 s − 1 ) and nutrient con...
Phycobiliproteins, nitrogenous compounds and fatty acid contents in field-colle...
E, Varela-Álvarez; Tobin, Paul R.; Guiheneuf, Freddy; FitzGerald, Richard J.; Stengel, Dagmar B.The extensive variation in the biochemical composition of algal species is used as a source of potential bioactive compounds for applications in the agri-food industry and in the field of functional foods. Among these species, Porphyra/Pyropia spp. (nori, laver) are red sea vegetables which provide the foundation for a billion-dollar industry. In this study, we determine the growth and biochemical composition o...
Development and characterization of twelve microsatellite markers for Porphyra ...
E, Varela-Álvarez; Paulino, Cristina; Serrao, EsterThe genus Porphyra (and its sister genus Pyropia) contains important red algal species that are cultivated and/or harvested for human consumption, sustaining a billion-dollar aquaculture industry. A vast amount of research has been focused on species of this genus, including studies on genetics and genomics among other areas. Twelve novel microsatellite markers were developed here for Porphyra linearis. Markers...
Niche conservatism and spread of seaweed invasive lineages with different resid...
Chefaoui, Rosa; E, Varela-ÁlvarezMarine algae invasions attract a lot of interest as they are altering the structure of marine ecosystems. However, niche dynamics and risk predictions of marine invasions integrating phylogeographic structure in the analyses have not yet been investigated. In this study, we perform a comprehensive analysis of two invasive lineages of Caulerpa taxifolia with different residence time in the Mediterranean Sea for ...
The rediscovery of Caulerpa prolifera in Ria Formosa, Portugal, 60 years after ...
Cunha, A. H.; E, Varela-Álvarez; Paulo, D. S.; Sousa, Inês; Serrão, EsterThe westernmost occurrence of Caulerpa prolifera on the Atlantic European coast has been accepted in recent decades, to be Huelva province, southern Spain. In April 2011, this species was found in Ria Formosa, southern Portugal, extending its westernmost limit along the Iberian Peninsula coastline. In the course of research into this species it was discovered that this alga had been found in Ria Formosa in the ...
Mediterranean Species of Caulerpa Are Polyploid with Smaller Genomes in the Inv...
E, Varela-Álvarez; Gómez Garreta, A.; Rull Lluch, J.; Salvador Soler, N.; Serrão, Ester; Siguán, M. A. R.Caulerpa species are marine green algae, which often act as invasive species with rapid clonal proliferation when growing outside their native biogeographical borders. Despite many publications on the genetics and ecology of Caulerpa species, their life history and ploidy levels are still to be resolved and are the subject of large controversy. While some authors claimed that the thallus found in nature has a h...
Molecular identification of the tropical seagrass Halophila stipulacea from Turkey
E, Varela-Álvarez; Rindi, F.; Cavas, L.; Serrão, Ester; Duarte, C. M.; Marrá, N.Halophila stipulacea (Forsskål) Ascherson, a tropical seagrass, is thought to be a Lessepsian immigrant that entered the Mediterranean Sea from the Red Sea after the opening of the Suez Canal (1869). Up to date, no genetic studies of H. stipulacea from Turkey are available. In order to verify the molecular identity of Turkish isolates of H. stipulacea, a part of the rDNA ITS region was sequenced. Comparisons of...
Dinucleotide microsatellite markers in the genus Caulerpa
E, Varela-Álvarez; Glenn, T. C.; Serrão, Ester; Duarte, C. M.; Martínez-Daranas, B.; Valero, Myriam; Marbà, N.Caulerpa spp. are clonal green marine algae which often act as invasive species when growing outside their native biogeographical borders. Over the two past decades, Caulerpa taxifolia has spread along the Mediterranean coast, presently occurring at 70 sites and covering nearly 3,000 ha of subtidal area. New genetic markers (microsatellites) have been developed to assess clonal structure and genetic diversity o...