Plants, being sessile, must constantly monitor and respond to environmental fluctuations and stressors. Among the diverse signalling modalities (chemical, hydraulic, hormonal), electrical signals stand out for their rapid propagation and capacity to serve as early warning cues. In this review, we examine the concept of electrobiological signatures—distinctive patterns of electrical activity in plants as potential early indicators of stress and adaptation. This review first discusses the fundamental mechanisms such as ion fluxes, membrane transporters, coupling with calcium dynamics, reactive oxygen species (ROS), and cross-talk with hormonal networks. Next, it explores how these signatures... More >