Productivity levels and lipid and starch contents for axenic C. minutissima (top) and co-cultures of C. minutissima and E. coli (bottom).

Productivities are five-day averages and lipid and starch contents are a percent of dry weight. Three biological replicates were used in all cases except for co-cultures grown on 10 g/L glycerol where only two replicates were used. Mean value is followed by standard deviation in parenthesis. Within substrate batches (e.g. axenic C. minutissima w/glucose), values followed by the same letter are not significantly different at the 0.05 level.