Fig. S1 Phyletic distribution pattern of characteristic domains within other essential signaling components in the plant disease resistance response pathway.

Fig. S2 Evolution of motif combinatorial patterns within the key domains of some essential genes in plant disease resistance response pathways.

Table S1 Whole-genome data used in this study

Table S2 Current available sequence data of nine early plant lineages from NCBI Genbank

Table S3 The characteristic domains within plant immune receptor genes and other essential signaling components in plant and animal innate immune systems

Table S4 Pfam and BLASTP analysis for candidate nucleotide-binding site (NBS) domain encoded in early plant lineages

Notes S1 Sequence and alignment files.

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