A root wound sent a pressure wave at about 75 mm per second

The hydraulic signal was about 10,000 times faster than previously described calcium waves used for comparison. GLR3.3/3.6 receptors then amplified depolarization and stress-hormone responses followed.

Unlike some leaf alarms, the root signal weakened exponentially with distance, which may suit the slower movement of pests through soil.

How pressure becomes information

Plant cells maintain high turgor. Damage causes a sudden pressure drop that travels physically through vascular tissue; mechanosensitive MCA1 ion channels translate it into membrane-voltage and calcium changes.

How causality was tested

The team combined voltage recording, calcium imaging and genetic comparisons. Optogenetics also produced repeated calcium signals without wounding to test later responsiveness.

Repeated signals reduced sensitivity

Preconditioned roots showed weaker electrical responses to later glutamate or injury. This is short-term sensitivity adjustment, not proof of memory or complete immunity.

Distance to farm use

Crops differ in roots, pests and soils. Crop-specific physiology and long field studies must show whether the pathway can protect yield or reduce pesticide use.

Primary source and independent checks

Primary source: Science Advances paper

Institutional explanation: University of Würzburg explanation

Independent check: EurekAlert independent distribution record

Read in other languages

한국어 · English · Español · 日本語 · Tiếng Việt