geotropism


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ge·ot·ro·pism

 (jē-ŏt′rə-pĭz′əm)
ge′o·tro′pic (jē′ə-trō′pĭk) adj.

geotropism

(ˌdʒiːəʊˈtrəʊpɪzəm)
n
(Botany) the response of a plant part to the stimulus of gravity. Plant stems, which grow upwards irrespective of the position in which they are placed, show negative geotropism
geotropic adj
ˌgeoˈtropically adv

ge•ot•ro•pism

(dʒiˈɒ trəˌpɪz əm)

n.
oriented movement or growth of an organism with respect to the force of gravity.
[1870–75]

ge·ot·ro·pism

(jē-ŏt′rə-pĭz′əm)
The growth of an organism in response to gravity. The downward growth of plant roots is an example of geotropism.

geotropic (jē′ə-trō′pĭk, jē′ə-trŏp′ĭk) adjective

geotropism

Botany. the response of a plant to the force of gravity. — geotropic, adj.
See also: Gravity
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.geotropism - an orienting response to gravity
tropism - an involuntary orienting response; positive or negative reaction to a stimulus source
Translations

geotropism

[dʒɪˈɒtrəˌpɪzm] ngeotropismo
References in periodicals archive ?
The reason may be more porosity and aeration that enhances roots penetration more deeply in sand media due to geotropism and attains more length.
3] and NAA affects flower and fruit setting, cell growth, apical dominance, geotropism and photoperiod.
The "Malaise" portion is efficient in sampling insects with negative geotropism, and the "window" portion is efficient in sampling insects with positive geotropism (Basset, 1988).
However, species with a high percentage of non-flying insects are less effective in the field because the parasitoid walking toward the bottom of the PVC is going against several intrinsic behavioral characteristics of species (negative geotropism and positive phototropism) and certainly has a reduced propensity for flight or develops deformed wings (PREZOTTI et al.
The term tropism existed previously in botany, back-formed from more specific terms for responses to stimulus, such as heliotropism, the tendency of plants to grow toward a light source, and geotropism, the response to gravity in orienting the plant's structure.
Auxin is the first plant hormone studied and it has been correlated with several developmental processes like root initiation, apical dominance, plant growth, geotropism and phototropism and fruit development (Paciorek & Friml, 2006).