Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


Growth or movement of a sessile organism in response to gravity, as the downward growth of plant roots. Also called geotropism.

grav′i·tro′pic (grăv′ĭ-trō′pĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Mentioned in ?
References in periodicals archive ?
In addition, [H.sub.2][O.sub.2] works as a signaling molecule in plants under biotic and abiotic stresses, being involved in several processes such as root gravitropism, tolerance to oxygen deficiency, strengthening of cell wall, senescence, photosynthesis, stomatal closure and in the control of cell cycle (Gechev et al., 2006; Petrov & Breusegem, 2012).
Strigolactones regulate rice tiller angle by attenuating shoot gravitropism through inhibiting auxin biosynthesis.
It has been reported that ABCB19 can enhance gravitropism of plant roots [30,34], which is conducive to deep rooting.
It appears there may be a lack of negative gravitropism in this species.
For example, [H.sub.2][O.sub.2] is involved in programing cell death, somatic embryogenesis, response to wounding, root gravitropism and ABA-mediated stomata closure, besides damaging of cellular macromolecules.
Role of cytokinin and auxin in shaping root architecture: regulating vascular differentiation, lateral root initiation, root apical dominance and root gravitropism. Annals of Botany, vol.
It is well evidenced that gravity can influence the direction of growth of plants, fungi, and animals, a feature known as gravitropism. Crustaceans exhibit endogenous circatidal and circadian rhythmicity.
(Not) Keeping the stem straight: a proteomic analysis of maritime pine seedlings undergoing phototropism and gravitropism. BMC Plant Biol 2010; 10: 217.
The lower growth volume was made by directing branches to grow downward by reducing gravitropism, and the upper growth volume was made by directing branches upward by increasing phototropism.