Figure 2: Orthologue–paralogue relationships and carnivory-related expression of digestive fluid proteins.
From: Genome of the pitcher plant Cephalotus reveals genetic changes associated with carnivory
a, Phylogenetic relationships of independently evolved carnivorous plants and, to their right, the digestive fluid proteins identified through proteomic analysis. Polytomy in the tree represents topological discrepancy between previously reported plastid and nuclear phylogenies (see Methods). Brackets connect protein variants likely to originate from the same gene. b, Phylogeny-based orthologue–paralogue classification. Branch colours denote species identities. Magenta on internal nodes indicates inferred duplication events. Gene numbers in collapsed clades are shown next to triangles. The collapsed clades do not contain genes encoding the digestive fluid proteins but may contain other Cephalotus genes as well as non-carnivorous plant genes. Complete trees are available in Supplementary Fig. 5. c,d, Transcriptome comparison of flat and pitcher organs in Cephalotus (c) and N. alata (d). Red numbers indicate positions of genes encoding digestive fluid proteins identified in this work (1–21, shown in a) and previous studies (22–25, Supplementary Table 24), several of which are outliers showing trap-specific expression.
