Fig. 3From: Testing for terrestrial and freshwater microalgae productivity under elevated CO2 conditions and nutrient limitationThe contents of carotenoids of the four selected terrestrial new green algal strains in full medium or under limited macronutrient supply, at ambient or 15% CO2 aeration in liquid culture. Growth conditions: AC, complete liquid medium aerated with ambient CO2; CC, complete medium and aeration at 15% CO2; A-P and C-P, aeration with ambient and 15% CO2 at phosphate limitation; A-N and C-N, aeration with ambient and 15% CO2 at nitrogen limitation. Data are expressed as mean ± SD from experiments performed in quadruplicateBack to article page