Rapid turnover of life-cycle-related genes in the brown algae.

Détails

Ressource 1Télécharger: document.pdf (1934.17 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_63D27DADD907
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Rapid turnover of life-cycle-related genes in the brown algae.
Périodique
Genome biology
Auteur(s)
Lipinska A.P., Serrano-Serrano M.L., Cormier A., Peters A.F., Kogame K., Cock J.M., Coelho S.M.
ISSN
1474-760X (Electronic)
ISSN-L
1474-7596
Statut éditorial
Publié
Date de publication
14/02/2019
Peer-reviewed
Oui
Volume
20
Numéro
1
Pages
35
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Résumé
Sexual life cycles in eukaryotes involve a cyclic alternation between haploid and diploid phases. While most animals possess a diploid life cycle, many plants and algae alternate between multicellular haploid (gametophyte) and diploid (sporophyte) generations. In many algae, gametophytes and sporophytes are independent and free-living and may present dramatic phenotypic differences. The same shared genome can therefore be subject to different, even conflicting, selection pressures during each of the life cycle generations. Here, we analyze the nature and extent of genome-wide, generation-biased gene expression in four species of brown algae with contrasting levels of dimorphism between life cycle generations.
We show that the proportion of the transcriptome that is generation-specific is broadly associated with the level of phenotypic dimorphism between the life cycle stages. Importantly, our data reveals a remarkably high turnover rate for life-cycle-related gene sets across the brown algae and highlights the importance not only of co-option of regulatory programs from one generation to the other but also of a role for newly emerged, lineage-specific gene expression patterns in the evolution of the gametophyte and sporophyte developmental programs in this major eukaryotic group. Moreover, we show that generation-biased genes display distinct evolutionary modes, with gametophyte-biased genes evolving rapidly at the coding sequence level whereas sporophyte-biased genes tend to exhibit changes in their patterns of expression.
Our analysis uncovers the characteristics, expression patterns, and evolution of generation-biased genes and underlines the selective forces that shape this previously underappreciated source of phenotypic diversity.
Mots-clé
Evolution, Molecular, Gene Duplication, Gene Expression, Germ Cells, Plant, Life Cycle Stages/genetics, Phaeophyta/genetics, Phaeophyta/growth & development, Phaeophyta/metabolism, Phenotype, Selection, Genetic
Pubmed
Web of science
Open Access
Oui
Création de la notice
28/02/2019 9:44
Dernière modification de la notice
20/08/2019 15:20
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