Why plants are so sensitive to gravity: The lowdown

Source: ScienceDaily

Plants can detect the slightest angle of inclination. Yet the mechanism by which they sense gravity relies on microscopic grains. In theory, such a system should hardly allow for precise detection of inclination. Researchers have now explained this curious paradox: the grains are constantly being agitated within the plant cells!

https://www.sciencedaily.com/releases/2018/05/180502131837.htm