Scientific research has found that, the reason why plants respond to touch is that they think they are being struck by the wind
The lodging probability of crops that are often blew at the edge of farmland is 80% higher than that of crops which can't be blew in the center of farmland.
they feel that they must increase their strength to prevent wind damage. Just a few seconds of strokes and taps on the stems of the plants every day can increase the density of its branches. Touched for less than 30 minutes, the plant's genes can produce proteins that increase the calcium content in its body. The increase in calcium then leads to the increase of the substance of Cadherin which can make the plant stronger.