Identification of Gracilariaceae (Rhodophyta) of central Portugal by histological and genetic methods

Freitas, Marta V.; Simões, Marco; Valdez, Christian; Afonso, Clélia; Trindade, Beatriz G.; Correia, Ana; Baptista, Teresa; Mouga, Teresa

http://hdl.handle.net/10400.8/6671

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Abstract(s)

This study aims to identify different populations of Gracilariaceae collected from the central coast of Portugal through light microscopy, anatomical observations and genetic tools, essential approaches to correctly assign species identity. Samples were obtained from Ria de Aveiro (AV), Figueira da Foz (FFBC, FFMD), and Lagoa de Óbidos (LOBR, LOEV, LOBS). Although histological observations offered a visual representation of the characteristic pseudoparenchymatous organization, they did not allow a clear distinction among the species. The amplification of a ∼700 bp fragment of the mitochondrial cytochrome oxidase I gene, and its sequencing enabled us to assign the populations FFBC and LOBS to Gracilaria gracilis, and the populations AV, FFMD, LOBR, and LOEV to Agarophyton vermiculophyllum. This contribution will help phycologists to correctly identify the Portuguese populations of Gracilaria sensu lato at the species level, which will be crucial in ensuring that future studies and industrial exploration accurately target the correct species.

Description

Research funding : This research was funded by Fundação para a Ciencia e Tecnologia (FCT), through the strategic ˆ project UIDB/04292/2020 granted to MARE, and the project Operational Programme MAR2020 through the project 16-02-01-FMP-84 – SeaWeedFeeds. Fundação para a Ciencia e Tecnologia (FCT) also supported this research ˆ through the individual doctoral grant UI/BD/150957/2021 attributed to Marta V. Freitas.

Keywords

Genetic analysis Gracilaria sp. Gracilarioids Seaweed histology Species identification

URI

http://hdl.handle.net/10400.8/6671

Citation

Freitas, M., Simões, M., Valdez, C., Afonso, C., Trindade, B., Correia, A., Baptista, T. & Mouga, T. (2022). Identification of Gracilariaceae (Rhodophyta) of central Portugal by histological and genetic methods. Botanica Marina, 65(1), 35-44. https://doi.org/10.1515/bot-2021-0017