Titel
The quagga mussel genome and the evolution of freshwater tolerance
Autor*in
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Abstract
Freshwater dreissenid mussels evolved from marine ancestors during the Miocene ∼30 million years ago and today include some of the most successful and destructive invasive species of freshwater environments. Here, we sequenced the genome of the quagga mussel Dreissena rostriformis to identify adaptations involved in embryonic osmoregulation. We provide evidence that a lophotrochozoan-specific aquaporin water channel, a vacuolar ATPase subunit and a sodium/hydrogen exchanger are involved in osmoregulation throughout early cleavage, during which time large intercellular fluid-filled ‘cleavage cavities’ repeatedly form, coalesce and collapse, expelling excess water to the exterior. Independent expansions of aquaporins coinciding with at least five freshwater colonization events confirm their role in freshwater adaptation. Repeated aquaporin expansions and the evolution of membrane-bound fluid-filled osmoregulatory structures in diverse freshwater taxa point to a fundamental principle guiding the evolution of freshwater tolerance and provide a framework for future species control efforts.
Stichwort
Dreissenaosmoregulationgenomequaggaaquaporin
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
DNA Research
Band
26
Ausgabe
5
ISSN
1340-2838
Erscheinungsdatum
2019
Seitenanfang
411
Seitenende
422
Publication
Oxford University Press (OUP)
Projekt
Kod / Identifikator
P 29455-B29
Fördergeber
Erscheinungsdatum
2019
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2019
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