Genome-wide identification and functional analysis of the cyclic nucleotide-gated channel gene family in Chinese cabbage.

Cyclic nucleotide-gated channels (CNGCs) are a class of nonselective cationic channels that are widely found in animals and plants. Plant CNGCs participate in numerous biological functions that vary from development to stress tolerance. Most genes have been identified in plant genomes, but no such comprehensive study has yet been conducted on Chinese cabbage. In this study, thirty genes were identified, divided into five groups, and used for evolutionary analysis. We assigned names of all individual members on the basis of phylogenetic relationship with . All genes were randomly distributed on chromosomes, and the A08 chromosome did not carry any gene. The genes of Chinese cabbage and from the same group displayed similar conserved motifs and gene structures. Especially the closer the homology, the higher the similarity. Quantitative expression analysis showed that most of the genes were expressed under four stresses, indicating that they play a key role in the stress response of Chinese cabbage. Expression patterns of 12 in the roots, stems, leaves, flowers, and siliques showed that and were specifically expressed only in flowers but not in other parts. This study lays a theoretical foundation for future research on the function of the CNGC gene family in Chinese cabbage.