MrBig46, here is an article on thigmotropism. In Czech, it looks like the word is thigmotropismus.
https://en.wikipedia.org/wiki/Thigmotropism
When a tomato plant is brushed across a couple of times a day, the plant responds by changing the way it grows. It is shorter and usually sturdier than tomato plants that are not stimulated. A simple way to do this is to use a broom handle to rub across the tops of the plants once or twice a day. Don't damage the plants, just make them bend a bit. This is one of the three special methods that MUST be known by a commercial tomato seedling producer.