At the roots of plant neurobiology -- Plant electrostimulation and data acquisition -- Plant response to stress: Microelectrode voltage clamp studies -- Application of non-invasive microelectrode flux measurements in plant stress physiology -- Intracellular measurements of the electrical properties of walled cells -- Making contact and measuring cellular electrochemical gradients -- Studying membrane transport processes by non-invasive microelectrodes: Basic principles and methods -- Multi-electrode array - a new approach to plant electrophysiology -- Electrochemical impedance spectroscopy -- Patch clamp techniques for plant cells -- pH banding in Charophyte algae -- Membrane excitation and cytoplasmic streaming as modulators of photosynthesis and proton flows in Characean cells -- Functional characterization of plant ion channels in heterologous expression systems -- Mechanism of passive permeation of ions and molecules through plant.