Fig. 1

Structural and evolutionary characterization of NAC genes in Amaranthus hypochondriacus. (A) Phylogenetic tree of 70 AhypNAC proteins constructed using the maximum likelihood method. (B) Conserved motif distribution; each coloured box represents a distinct motif, and black lines indicate non-conserved regions. (C) Predicted NAC domains highlighted in green. (D) Gene structure showing coding sequences (CDS) in yellow and untranslated regions (UTRs) in green. (E) Legend for motif and gene structure representations. Nucleotide and amino acid lengths are indicated by scale bars.