The dynamics of adaptive evolution in microalgae in a high-CO 2 ocean.

Autor: Wu F; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Zhou Y; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Beardall J; School of Biological Sciences, Monash University, Clayton, VIC, 3800, Australia., Raven JA; Division of Plant Science, University of Dundee at the James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK.; School of Biology, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.; Climate Change Cluster, University of Technology, Sydney, Ultimo, NSW, 2007, Australia., Peng B; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Xu L; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Zhang H; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Li J; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Xia J; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China., Jin P; School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Nov 29. Date of Electronic Publication: 2024 Nov 29.
DOI: 10.1111/nph.20323
Abstrakt: Marine microalgae demonstrate a notable capacity to adapt to high CO 2 and warming in the context of global change. However, the dynamics of their evolutionary processes under simultaneous high CO₂ and warming conditions remain poorly understood. Here, we analyze the dynamics of evolution in experimental populations of a model marine diatom Phaeodactylum tricornutum. We conducted whole-genome resequencing of populations under ambient, high-CO 2 , warming and high CO 2  + warming at 2-yr intervals over a 4-yr adaptation period. The common genes selected between 2- and 4-yr adaptation were found to be involved in protein ubiquitination and degradation and the tricarboxylic acid (TCA) cycle, and were consistently selected regardless of the experimental conditions or adaptation duration. The unique genes selected only by 4-yr adaptation function in respiration, fatty acid, and amino acid metabolism, facilitating adaptation to prolonged high CO 2 with warming conditions. Corresponding changes at the metabolomic level, with significant alterations in metabolites abundances involved in these pathways, support the genomic findings. Our study, integrating genomic and metabolomic data, demonstrates that long-term adaptation of microalgae to high CO 2 and/or warming can be characterized by a complex and dynamic genetic process and may advance our understanding of microalgae adaptation to global change.
(© 2024 The Author(s). New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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