Examples of trans-kingdom RNA-mediated signal transfer.

The “From” and “To” columns indicate the direction of the reported signals. The “K” column shows the kingdom in which the organisms are classified. Although more advanced classifications of the tree of life have been proposed, we chose to use the six kingdom system proposed by Cavalier-Smith in 1998 [64]. P, Planta; A, Animalia; F, Fungi; B, Bacteria; C, Chromists; Pr, Protists.Examples of trans-kingdom RNA-mediated signal transfer.