Electrical stimulation — and, by a related pathway, magnetized water irrigation — induces an influx of calcium ions into the cytoplasm, where they function as a ubiquitous secondary messenger. This increase in intracellular calcium triggers systemic gene expression changes, adapts the plant to stressors, and stimulates proton pumps for ATP synthesis during photosynthesis.
In the magnetized water pathway, the trigger is physical rather than electrical: the restructured hydrogen-bond network of magnetized water (see [[mechanism-magnetic-water-hydrogen-restructuring]]) increases membrane permeability to Ca²⁺. Goldsworthy et al. (1999) demonstrated this directly in yeast — weak conditioning (100 kHz EMF, 5–30 s) produced 53% more cell growth via this calcium permeability mechanism, while over-conditioning damaged membranes and inhibited growth by 50%, confirming that dosing is critical regardless of the induction method.