Electrical Signaling Speed in Mimosa pudica Exceeds Previous Estimates by 10x
Volkov A, Ranatunga D, Markin V
Plant Signaling
It suggests plants are far more electrically 'wired' than we imagined — meaning the garden plants around you may be sensing and reacting to their environment at speeds closer to animal reflexes than anyone suspected.
When you touch a sensitive plant and it folds its leaves, that reaction is driven by an electrical pulse — similar in concept to a nerve signal in your body. Scientists just discovered those pulses travel ten times faster than old measurements suggested. The speed changes with temperature in a way that hints at living chemistry being involved, not just simple physics.
Key Findings
Action potentials in Mimosa pudica propagate at 40 cm/s — 10x faster than the previously accepted 4 cm/s measured in classic studies.
Electrical signals travel through phloem sieve tubes and depend on calcium channel activation, identifying a specific biological pathway.
Signal speed has a Q10 of 2.1, meaning it roughly doubles with every 10°C temperature increase, indicating enzymatic (biochemical) involvement rather than purely passive conduction.
chevron_right Technical Summary
Sensitive plants (Mimosa pudica) transmit electrical signals 10 times faster than scientists previously thought — at 40 cm/s rather than 4 cm/s. This rewrites our understanding of how quickly plants can sense and respond to touch or damage.
Abstract Preview
High-speed electrode arrays measured action potential propagation in sensitive plant at 40 cm/s, 10x faster than the 4 cm/s reported in classic studies. Signals travel via phloem sieve tubes and re...
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Mimosa pudica is a creeping annual or perennial flowering plant of the pea/legume family Fabaceae. It is often grown for its curiosity value: the sensitive compound leaves quickly fold inward and droop when touched or shaken and re-open a few minutes later. For this reason, this species is common...