The comparative analysis of two spr

The comparative analysis of two springtail transcriptomes to three crustacean outgroup species
and three insects revealed a range functional categories that likely were under strong selective
pressure during divergence of Collembola and Hexapoda. These categories could be
clustered in the following groups: genes involved in stress response against pathogens and toxic
compounds; genes involved in interaction with the environment (i.e. osmotic pressure); genes
involved in metabolism and more specifically energy metabolism; regulation and development-related
processes. This study provides clues towards the toolkit used to adapt to terrestrialization
and should be compared in the future to other terrestrialization events that
occurred in the tree of life