Jasper County Democrat, Volume 6, Number 21, Rensselaer, Jasper County, 29 August 1903 — How Plants Remain Upright. [ARTICLE]

How Plants Remain Upright.

If a flowerpot is laid on Its side the stalk of the plant growing in it gradually curves upward until it resumes the vertical position. This is called geotropic curvature, and the question is by what means the plant is stimulated to change its direction of growth. One theory avers that movable starch grains in the plant cells fail to the lower side as the position is changed and by their pressure influence the mechanism of growth.