Fig. 3

Biomass and starch production during photoautotrophic N deprivation. All strains were grown photoautotrophically in an MM medium supplemented with 2 % CO₂, at a light intensity of 100 µmol photons m⁻² s⁻¹ and then subjected to N deprivation (at day 0). a Visual observation of cell pellets from 1 ml N-starved cells harvested at different time points. b Biomass (measured as dry weight) and intracellular starch were determined in N-starved strains. Data represent means ± SD (n = 3) (upper error bar dry weight, lower error bar, starch). c Northern blot analysis of DYRKP transcripts in response to N deprivation