Example Sentences

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He shows that roots, which have been placed in a horizontal position and have therefore been geotropically stimulated, can be distinguished by a chemical test from vertical, i.e. unstimulated roots.

From Darwin and Modern Science by Seward, A. C. (Albert Charles)

Cucurbita ovifera: course followed by a radicle in bending geotropically downwards, traced on a horizontal glass, between 11.25 A.M. and 10.25 P.M.; the direction during the night is indicated by the broken line.

From The Power of Movement in Plants by Darwin, Charles

These petioles bend down geotropically like a root and penetrate the ground, so that the true root, which afterwards becomes greatly enlarged, is buried at some little depth beneath the surface.

From The Power of Movement in Plants by Darwin, Charles