Fig. 8

The relative enzyme activities and gene transcript levels in Chlamydomonas reinhardtii strain CC4533. The relative enzyme activities and gene transcript levels of glutamine synthetase (GS) (a, b), glutamate synthase/NADH-dependent (NADH-GSN) (c, d), glutamate synthase/Fd-dependent (Fd-GSN) (e, f), aspartate aminotransferase (AST) (g, h), alanine aminotransferase (ALT) (i, j), pyruvate kinase (PK) (k, l), and citrate synthase (CS) (m, n) were detected after 0, 12, 24, and 48 h of N starvation, and control (0 h) value of each enzyme activity or gene transcript level was set to 1 for easy comparison. The significance of the differences between the 0 h and other test values in each panel was tested using a one-way ANOVA. *p < 0.05