Salinity tolerance mechanisms of an Arctic Pelagophyte using comparative transcriptomic and gene expression analysis.

ABSTRACT: Little is known at the transcriptional level about microbial eukaryotic adaptations to short-term salinity change. Arctic microalgae are exposed to low salinity due to sea-ice melt and higher salinity with brine channel formation during freeze-up. Here, we investigate the transcriptional response of an ice-associated microalgae over salinities from 45 to 8. Our results show a bracketed response of differential gene expression when the cultures were exposed to progressively decreasing salinity. Key genes associated with salinity changes were involved in specific metabolic pathways, transcription factors and regulators, protein kinases, carbohydrate active enzymes, and inorganic ion transporters. The pelagophyte seemed to use a strategy involving overexpression of Na⁺-H⁺

SUBMITTER: Freyria NJ 

PROVIDER: S-EPMC9133084 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature