The Story: How Scientists Discovered That Plant Roots Can Hear Water
In 2017, researchers at the University of Western Australia, led by Dr. Monica Gagliano, conducted a groundbreaking experiment that revealed an astonishing truth: plants can detect the sound of water and respond to it.
The Experiment
The team wanted to test whether plant roots could “sense” water using sound. So they designed a clever setup using pea plants (Pisum sativum) grown in Y-shaped plastic tubes:
In one arm of the Y-tube, they placed a plastic pipe with flowing water (like the sound of water running through a pipe).
In the other arm, no water was present—just silence.
The soil near both arms was completely dry—so the plant roots couldn’t use moisture as a cue. The only difference was the sound of water.
What Happened?
To the scientists’ surprise, the plant roots consistently grew toward the arm where they could hear the sound of water—even when there was no actual moisture nearby. It was as if the roots were “listening” and choosing the direction that promised hydration.
But How Is That Possible?
Plants don’t have ears, but they can sense vibrations in the soil. The flowing water creates tiny vibrations, and the roots may be picking up on these signals using mechanoreceptors—special cells that respond to physical forces.
What are you thought on this Discovery?