Targeted in vivo mutagenesis of a sensor histidine kinase playing an essential role in ABA signaling of the moss Physcomitrium patens.

Land plants exhibit various adaptation responses to unfavorable water environments, such as drought and flooding. The phytohormone abscisic acid (ABA) and ethylene play essential roles in plant adaptation to drought and flooding, respectively. It remains largely unknown how plants integrate environmental information for water availability.