Genome-Wide Identification and Functional Analysis of the CNGC Gene Family in Suaeda glauca

Cyclic nucleotide-gated channel (<i>CNGC</i>) genes play key regulatory roles in plant immunity and abiotic stress responses. In this study, we conducted a genome-wide identification and analysis of the <i>CNGC</i> gene family in <i>Suaeda glauca</i>. A total of 44 <i>SgCNGC</i> genes were identified. Through phylogenetic analysis, gene structure analysis, chromosome distribution, conserved motif analysis, collinearity analysis, cis-acting element analysis, subcellular localization, and gene overexpression analysis, we systematically characterized the evolutionary relationships, structural features, and potential functions of this gene family. The results indicate that the <i>SgCNGC</i> gene family is evolutionarily highly conserved but exhibits functional divergence in structure and expression. Furthermore, functional assays revealed that overexpression of SgCNGC13 in Arabidopsis thaliana led to increased salt sensitivity, indicating a negative regulatory role for this gene under salt stress. These findings provide a foundation for understanding the role of the <i>CNGC</i> gene family in the growth, development, and stress response of <i>S. glauca</i> and contribute to the remediation of saline-alkali land.