<i>LuCSD3</i> enhances salt stress tolerance in flax: genome-wide profiling and functional validation of the SOD gene family.

ABSTRACT: Superoxide dismutase (SOD) serves as a critical regulator of plant stress adaptation to salinity, drought, and heavy metal toxicity. Flax (Linum usitatissimum L.), a globally cultivated oilseed and fiber crop, lacks comprehensive genomic characterization of its SOD gene family. Here, we systematically identified 12 LuSOD genes in the flax genome. Phylogenetic reconstruction of SOD homologs across diverse plant species classified these genes into three evolutionarily conserved subgroups: Cu/Zn-SOD (6 LuCSD), Fe-SOD (3 LuFSD), and Mn-SOD (3 LuMSD). Comparative analysis of exon-intron architectures and conserved motifs revealed high structural conservation among LuSOD members within each clade. Promoter cis-element profiling identified predomin

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC12268355 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature