Figure 6.

Hypothesized photosynthetic carbon fluxes of C₄ + CAM in P. amilis. Major carbon fluxes when well-watered (A) and droughted (B). Red, blue, and purple lines indicate NAD-specific, NADP specific, and shared reactions, respectively, and gray lines show possible pathways for malate that are unique to C₄ + CAM photosynthesis. Line thicknesses are indicative of relative fluxes through pathways. ALAAT, alanine aminotransferase; ASP, aspartate aminotransferase; BCA, beta carbonic anhydrase; CBC, Calvin-Benson cycle; NAD-MDH, NAD-dependent malate dehydrogenase; NAD-ME, NAD-dependent malic enzyme; NADP-MDH, NADP-dependent malate dehydrogenase; NADP-ME, NADP-dependent malic enzyme; OAA, oxaloacetate; PEP, phosphoenolpyruvate; PEPC, PEP carboxylase; PPCK, PEPC kinase; PPDK, pyruvate, phosphate dikinase.