Abstract
Three isolates ofSpirulina platensis (Norst) Geitler marked BP, P4P and Z19/2 were compared with respect to their response and acclimation capability to high photon flux densities (HPFD). Cultures exposed to HPFD (1500–3500 μmol photon m−2 s−1) exhibited a marked decrease in light-dependent O2 evolution rate. P4P was more sensitive to HPFD than the two other isolates. All three isolates recovered from photoinhibition when placed under low PFD. The BP isolate was able to recover also in the dark but to a lower extent and at a lower rate, while no recovery was observed in the other two isolates under dark conditions. No recovery was observed when protein synthesis was inhibited using chloramphenicol. Cultures grown at 200 μmol photon m−2 s−1 differed from cultures grown at 120 μmol photon m 2 s-1 by their lower maximal photosynthetic rate (P max ) and higher light saturation (I k ) value, while being more resistant to HPFD stress. The ability ofSpirulina isolates to acclimate and withstand HPFD may provide useful information for the selection of strains useful for outdoor mass cultivation.
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Vonshak, A., Chanawongse, L., Bunnag, B. et al. Light acclimation and photoinhibition in threeSpirulina platensis (cyanobacteria) isolates. J Appl Phycol 8, 35–40 (1996). https://doi.org/10.1007/BF02186220
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DOI: https://doi.org/10.1007/BF02186220