Identification and evolution of C photosynthetic pathway genes in plants.

Background: NADP-malic enzyme (NAPD-ME), and pyruvate orthophosphate dikinase (PPDK) are important enzymes that participate in C photosynthesis. However, the evolutionary history and forces driving evolution of these genes in C plants are not completely understood.

Results: We identified 162 NADP-ME and 35 PPDK genes in 25 species and constructed respective phylogenetic trees.