Comparative Analysis and Expression Patterns of the PLP_deC Genes in Dendrobium officinale

Studies have shown that the type II pyridoxal phosphate-dependent decarboxylase (PLP_deC) genes produce secondary metabolites and flavor volatiles in plants, and TDC (tryptophan decarboxylase), a member of thePLP_deCfamily, plays an important role in the biosynthesis of terpenoid indole alkaloids (TIAs). In this study, we identified eightPLP_deCgenes inDendrobium officinale(D. officinale) and six inPhalaenopsis equestris(P. equestris), and their structures, physicochemical properties, response elements, evolutionary relationships, and expression patterns were preliminarily predicted and analyzed. The results showed thatPLP_deCgenes play important roles inD. officinaleand respond to different exogenous hormone treatments; additionally, the results support the selection of appropriate candidates for further functional characterization ofPLP_deCgenes inD. officinale.Keywords:Dendrobium officinale;PLP_deC;bioinformatics;expression pattern analysis;evolution