Fig. 3.
The effect of increasing photon fluence densities up to 1432 μmol photons m−2 s−1 on the relative electron transport rate (rETR, μmol electrons m−2 s−1) in 3 of the studied Klebsormidium strains (n = 4, mean value ± SD). BIOTA 14614.7 (African Strain A), BIOTA 14613.5e (African Strain B), and SAG 384-1 (Arctic Strain). BIOTA 14614.18.24 (African Strain C) showed the same curve shape as BIOTA 14613.5e (African Strain B) and hence was not shown. All measurements were done at 22 ± 1 °C.