Fig. 4From: Coupling and uncoupling of triglyceride and beta-carotene production by Dunaliella salina under nitrogen limitation and starvationResponses of triglycerides (a), polar lipids (b), and total lipids (c) quotas to the nitrogen status (N:C). Three phases can be distinguished (i) N-replete, (ii) N limitation, and (iii) N starvationBack to article page