Light Induced Changes in Pigment and Lipid Profiles of Bryopsidales Algae

Bryopsidales (Chlorophyta) are cultured and consumed in several regions of the planet known for their high nutritional value bioprospection potential, due to a content relevant polar lipids polysaccharides. Among other characteristic features, these marine algae possessing unique photosynthetic pigment-protein complexes absence (in nearly all species investigated) functional xanthophyll cycle, ubiquitous photoprotection mechanism present most plants. With aim characterizing photophysiology this atypical group algae, we investigated changes pigment lipidome two ( Codium tomentosum Bryopsis plumosa ) exposed 7 days low or irradiance (20 vs. 1,000 μmol photons m –2 s –1 ). Our results show that light has strong effect on composition, triggering time-dependent accumulation all- trans -neoxanthin t -Neo) violaxanthin (Viola). High light-acclimated macroalgae also displayed shift lipidome, including trend lyso-glycolipids, highly unsaturated phospholipids betaine lipids. We hypothesize observed shifts lipid composition could promote interaction between -Neo Viola with siphonaxanthin–chlorophyll–protein (SCP) photosystem II (PSII) within thylakoid membranes chloroplasts. Light induced contribute fitness by reducing damages apparatus under increased irradiance.