Triacylglycerol content and total fatty acid productivity. (A) Lipid content 12 days after nitrogen depletion. TAG (grey bars) and polar lipid (glycolipids and phospholipids) (white bars) content as percentage of dry weight. The values are derived from duplicate cultures. Deviation from the duplicate average is indicated by the error bars. (B) Productivity calculated between two consecutive time points in mg L-1 day-1. Wild type is represented by solid black line and the mutants are represented by grey lines. (C) Fold change in productivity (calculated between two consecutive time points) for all starchless mutants (greyscale) compared to the wild type (solid line). slm, starchless mutant; TAG, triacylglycerol; TFA, total fatty acid; wt, wild type.