Fig. 2From: Characterization of a heat-tolerant Chlorella sp. GD mutant with enhanced photosynthetic CO2 fixation efficiency and its implication as lactic acid fermentation feedstockGrowth performance in outdoor PBR. Biomass production (A) and appearance (B) of Chlorella sp. GD wild type and mutant M4 were determined in outdoor PBR aerated with 6% CO2. The data are expressed as the mean ± SD (n = 3) and different letters indicate significant difference between the culture times (P < 0.05). Air temperature (C), PBR temperature (D), irradiance outside PBR (E), and irradiance inside PBR (F) were recorded over culture periodBack to article page