Fig. 1

Phylogenetic tree and conserved motifs of the NLP gene family. A A neighbor-joining phylogenetic tree of NLPs from tomato (Solanum lycopersicum), Arabidopsis (Arabidopsis thaliana), canola (Brassica napus), rice (Oryza sativa) and maize (Zea mays). All NLP proteins were assigned into three clades. B Motifs were identified by MEME. The motifs are displayed in different colors. The scale bar represents 300 amino acids. The exon-intron structures were identified by GSDS. The untranslated regions (UTR) and coding sequences (CDS) are displayed in different colors. The scale bar represents 2000 nucleotides. C Sequences of identified motifs including three unknown domains (yellow, pink and red), the RWP-RK domain (yellow) and the PB1 domain (dark green)