Fig. 3From: Characterization of a heat-tolerant Chlorella sp. GD mutant with enhanced photosynthetic CO2 fixation efficiency and its implication as lactic acid fermentation feedstockInteractive effects of temperature, light, and CO2 concentration on algal growth and photosynthesis. The effects of temperature (25 and 40 °C), light intensity (50 and 200 μmol/m2/s), and CO2 concentration (ambient air and 6% CO2) on biomass production (A–D) and photosynthetic O2 evolution rate (E–H) of Chlorella sp. GD wild type and mutant M4 were determined 4 days after culture in indoor PBR. The data are expressed as the mean ± SD (n = 3) and different letters indicate significant difference between the culture times (P < 0.05)Back to article page