Stress responses in an Arctic microalga (Pelagophyceae) following sudden salinity change revealed by gene expression analysis.

Autor: Freyria NJ; Department of Natural Resource Sciences, McGill University, Ste. Anne-de-Bellevue, QC, Canada. nastasia.freyria@mcgill.ca.; Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada. nastasia.freyria@mcgill.ca.; Québec Océan, Département de Biologie, Université Laval, Québec, QC, Canada. nastasia.freyria@mcgill.ca., de Oliveira TC; Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada.; Centre d'Étude de la Forêt, Faculté de Foresterie, de Géographie et de Génomique, Université Laval, Québec, QC, Canada., Chovatia M; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Johnson J; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Kuo A; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Lipzen A; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Barry KW; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Grigoriev IV; U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.; Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, USA., Lovejoy C; Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada. Connie.Lovejoy@bio.ulaval.ca.; Québec Océan, Département de Biologie, Université Laval, Québec, QC, Canada. Connie.Lovejoy@bio.ulaval.ca.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 Sep 04; Vol. 7 (1), pp. 1084. Date of Electronic Publication: 2024 Sep 04.
DOI: 10.1038/s42003-024-06765-7
Abstrakt: Marine microbes that have for eons been adapted to stable salinity regimes are confronted with sudden decreases in salinity in the Arctic Ocean. The episodic freshening is increasing due to climate change with melting multi-year sea-ice and glaciers, greater inflows from rivers, and increased precipitation. To investigate algal responses to lowered salinity, we analyzed the responses and acclimatation over 24 h in a non-model Arctic marine alga (pelagophyte CCMP2097) following transfer to realistic lower salinities. Using RNA-seq transcriptomics, here we show rapid differentially expressed genes related to stress oxidative responses, proteins involved in the photosystem and circadian clock, and those affecting lipids and inorganic ions. After 24 h the pelagophyte adjusted to the lower salinity seen in the overexpression of genes associated with freezing resistance, cold adaptation, and salt tolerance. Overall, a suite of ancient widespread pathways is recruited enabling the species to adjust to the stress of rapid salinity change.
(© 2024. The Author(s).)
Databáze: MEDLINE
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