tropism

(redirected from Plant movements)
Also found in: Dictionary, Thesaurus, Encyclopedia.

tropism

 [tro´pizm]
a growth response in a nonmotile organism elicited by an external stimulus, and either toward the stimulus (positive tropism) or away from it (negative tropism); used as a word element combined with a stem that indicates the nature of the stimulus (e.g., phototropism) or the material or entity for which an organism or substance shows a special affinity (e.g., neurotropism). See also taxis.

tro·pism

, positive tropismnegative tropism (trō'pizm),
The phenomenon, observed in living organisms, of moving toward (positive tropism) or away from (negative tropism) a focus of light, heat, or other stimulus; usually applied to the movement of a portion of the organism as opposed to taxis, the movement of an entire organism.
[G. tropē, a turning]

tropism

/tro·pism/ (tro´pizm) the turning, bending, movement, or growth of an organism or part of an organism elicited by an external stimulus, either toward (positive t.) or away from (negative t.) the stimulus; used as a word element combined with a stem indicating the nature of the stimulus (e.g., phototropism) or material or entity for which an organism (or substance) shows a special affinity (e.g., neurotropism). Usually applied to nonmotile organisms.

tropism

(trō′pĭz′əm)
n.
The turning or bending movement of an organism or a part of an organism in a particular direction in response to an external stimulus such as light or gravity.

tro′pic, tro·pis′tic adj.
tro·pis′ti·cal·ly adv.

tro·pism

(trō'pizm)
The phenomenon, observed in living organisms, of moving toward (positive tropism) or away from (negaive tropism) a focus of light, heat, or other stimulus; usually applied to the movement of a portion of the organism as opposed to taxis, the movement of an entire organism.
[G. tropē, a turning]

tropism

An automatic movement made by an organism towards or away from a source of stimulation.

tropism

a bending growth movement in a plant either away from or towards a directional stimulus. Tropic movements are brought about by unequal growth on the two sides of an organ (such as the stem) brought about by unequal distributions of AUXIN. See PHOTOTROPISM, GEOTROPISM, THIGMOTROPISM, CHEMOTROPISM.

tropism

a growth response in a nonmotile organism elicited by an external stimulus, and either toward (positive tropism) or away from (negative tropism) the stimulus; used as a word element combined with a stem indicating nature of the stimulus (e.g. phototropism) or material or entity for which an organism (or substance) shows a special affinity (e.g. neurotropism).
References in periodicals archive ?
So are these channels at the bottom of the really fast plant movements like the sensitive plant's famous touch shyness?
If students in introductory classes encounter Darwin's botanical work, it is most likely the last investigations that he did on plant movements in collaboration with his son Francis (Darwin & Darwin, 1896).
They could include a ban on outward plant movements,and measures to stop it being spread by visitors.