Phylogeny of genera Laminaria and Saccharina (Laminariales, Phaeophyceae) based on three molecular markers

Shan, Changliang; Hao, Qian; Li, Tianyong; Wang, Xumin; Liu, Cui; Ren, Lei; Tang, Xuexi; Liu, Tao

doi:10.1007/s13131-014-0525-3

Cited by 1 publication

(2 citation statements)

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“…Although a comprehensive taxonomic revision of the genus is still lacking, Chi et al. () produced the richest phylogeny of the order Laminariales, and confirmed the findings of Lane et al. ().…”

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confidence: 53%

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A phylogeographic investigation of the kelp genusLaminaria(Laminariales, Phaeophyceae), with emphasis on the South Atlantic Ocean

Rothman

Mattio

Bolton

2017

Journal of Phycology

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The genus Laminaria has a wide distribution range compared with other kelp genera because it is found in both the North and the South Atlantic, on both sides of the North Pacific, as well as in the Mediterranean. Hypotheses behind this biogeographical pattern have been discussed by several authors but have not yet been fully evaluated with time-calibrated phylogenies. Based on the analysis of four molecular markers (ITS2, rbcL, atp8 and trnWI), our goal was to reassess the Laminaria species diversity in South Africa, assess its relationship with the other species distributed in the South Atlantic and reconstruct the historical biogeography of the genus. Our results confirm the occurrence of a single species, L. pallida, in southern Africa, and its sister relationship with the North Atlantic L. ochroleuca. Both species belonged to a clade containing the other South Atlantic species: L. abyssalis from Brazil, and the Mediterranean L. rodriguezii. Our time-calibrated phylogenies suggest that Laminaria originated in the northern Pacific around 25 mya, followed by at least two migration events through the Bering Strait after its opening (~5.32 mya). Today, the first is represented by L. solidungula in the Arctic, while the second gave rise to the rest of the Atlantic species. The colonization of the North Atlantic was followed by a gradual colonization southward along the west coast of Europe, into the Mediterranean (~2.07 mya) and two recent, but disconnected, migrations (~1.34 and 0.87 mya) across the equator, giving rise to L. abyssalis in Brazil and L. pallida in southern Africa, respectively.

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confidence: 53%

“…Furthermore, the ITS analyses of Chi et al. () resolved a clade consisting of L. ephemera , L. solidungula , and L. yezoensis supporting a possible close relationship between those three species of Laminaria with discoid holdfasts. Although this clade was not consistently recovered in other studies (e.g., Lane et al.…”

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confidence: 93%