Abstract 1154 Complementary Chromatic Adaptation in the Red Alga Galdieria yellowstonensis

Galdieria yellowstonensis is an extremophilic red alga which has a broad range of pigments of both cyanobacterial (phycobilins and phycobiliproteins) and eukaryotic (chlorophyll-based) origin. This alga is thus capable of adjusting its light-harvesting apparatus to the wavelengths available through chromatic adaptation and modulation of pigment usage and expression. Chromatic adaptation was induced in G. yellowstonensis to determine differences in exciton and electron usage driving the light reactions under specific light regimes.