Light-dependent variations in fatty acid profiles and gene expression in Antarctic microalgal cultures.

ABSTRACT: Photosynthetic eukaryotic microalgae are key primary producers in the Antarctic sea ice environment. Anticipated changes in sea ice thickness and snow load due to climate change may cause substantial shifts in available light to these ice-associated organisms. This study used a laboratory-based experiment to investigate how light levels, simulating different sea ice and snow thicknesses, affect fatty acid (FA) composition in two ice associated microalgae species, the pennate diatom Nitzschia cf. biundulata and the dinoflagellate Polarella glacialis. FA profiling and transcriptomic analyses were used to compare the impact of three light levels: High (baseline culturing conditions 90 ± 1 μmol photons m-2 s-1), mid (10 ± 1 μmol photons m-2 s-1); and low (1.5 ± 1 μmol photons m-2 s-1) on each

SUBMITTER: Stuart J 

PROVIDER: S-EPMC11737666 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature