ROS, Moss, and a Rossmann Fold Protein: Identification of a Key Signaling Component for Plant Immunity

Despite our current knowledge of early defense responses, more components need to be identified to untangle the signaling cascades leading to activation of PTI in mosses and liverworts. Through the identification and characterization of these key components, a holistic view of plant defense pathways will be obtained. This will facilitate future attempts for engineering more resistant plants. In this issue of Molecular Plant-Microbe Interactions, Marttinen et al. (2023) identified a key gene from Physcomitrella (new botanical name: Physcomitrium patens) in chitosan-induced early immune response.