geotropism


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geotropism

 [je-ot´ro-pizm]
tropism in response to gravity, i.e., either toward or away from the earth; growth influenced by gravity.

ge·o·tax·is

(jē'ō-tak'sis),
A form of positive barotaxis in which there is a tendency to growth or movement toward or into the earth.
Synonym(s): geotropism
[geo- + G. taxis, orderly arrangement]

geotropism

/ge·ot·ro·pism/ (je-ah´trah-pizm) a tendency of growth or movement toward or away from the earth; the influence of gravity on growth.

geotropism

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

geotropism

see GRAVITROPISM.

geotropism

) a plant growth movement that occurs in response to gravity. Thus roots are positively gravitropic (growing downwards), while shoots are generally negatively gravitropic (growing upwards).

geotropism

a tendency of growth or movement toward or away from the earth; the influence of gravity on growth.
References in periodicals archive ?
Ethylene--influences geotropism, leaf abscission, and the ripening of fruit.
In some cases SPSAs were bent into the culture medium and had a positive geotropism.
Positive geotropism results in plant roots growing toward the earth (down), whereas negative geotropism results in plant shoots growing away from the earth.
That first white piece to pop its head out of the seed is the radicle and it has a strange attraction to gravity known as geotropism.
Schopenhauer's use of the rhizome metaphor anticipates another point of Pongian interest, that is, the point between stem and roots where the plant's growth process passes from positive to negative geotropism, growing in two directions--the stem against, the roots with, gravity (Ponge, Fleurs 106).
The sporophyte was at first relatively undifferentiated, with no distinction between stem and leaf, and became erect by negative geotropism.