Cause of reduced sensitivity (fatigue) under repeated electrostatic stimulation

Ascertain the physiological and molecular cause of the reduced sensitivity observed in Arabidopsis thaliana calcium signaling upon repeated application of high-voltage electrostatic stimulation above the leaf surface, and determine whether specific reversible fatigue mechanisms or other processes (distinct from tissue damage or cell death) underlie the desensitization.

Background

Electrostatic stimulation produced strong, leaf-wide calcium signals that diminished markedly with repeated application, suggesting desensitization or fatigue.

Although no macroscopic damage was observed and partial recovery occurred after a 2.5-hour interval, the underlying cause of the reduced sensitivity remains unresolved and is flagged for future investigation.

References

This suggests recovery occurs between experiments and that the reduction in response over shorter timeframes is a result of fatigue rather than irreversible tissue damage or cell death, though the cause of the reduced sensitivity remains unclear and should be explored in future studies.

— A multi-physics approach to probing plant responses: From calcium signaling to thigmonastic motion  (2501.18215 - Gennis et al., 30 Jan 2025) in Section 3.1 (Calcium Signalling)