gravitropism


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gravitropism

(grə-vĭt′rə-pĭz′əm)
n.
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.

gravitropism

(formerly
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References in periodicals archive ?
Dark-grown gametophytes were first examined for a display of gravitropism.
Thus, these mutants showed an enhancement of negative gravitropism compared with the her1 mutants.
To confirm this hypothesis, white-light irradiation effects on gravitropism were examined using her1 gametophytes (Fig.
Gametophytes showed negative gravitropism similar to that as seen in most seedlings of vascular plants, caulonema of the moss Physcomitrella patens (Martin et al.
Gravitropism in plants occurs in three temporal stages: gravity perception, signal transduction, and organ response (Kumar et al.
As shown in Figure 3, the white-light irradiation that is required to induce spore germination weakened the negative gravitropism in her1 gametophytes, indicating that light irradiation on spores influences the later negative gravitropism of dark-grown gametophytes.
richardii gametophytes, however, phytochrome is responsible for the inhibition of gravitropism in Arabidopsis thaliana (Poppe et al.
Interactions between gravitropism and phototropism in plants.
Phytochromes inhibit hypocotyl negative gravitropism by regulating the development of endodermal amyloplasts through phytochrome-interacting factors.