Sensitive plants send electrical signals ten times faster than thought
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
Original paper
Electrical Signaling Speed in Mimosa pudica Exceeds Previous Estimates by 10x
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...