tropism


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to tropism: viral tropism

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 ?
88] These methods have increased the sensitivity of imaging and even the stem cell glioma tropism.
There are a number of viral vector systems other than AAV, such as adenoviral-based vectors and lentivirus-based systems, each of which has individual strengths and weaknesses with regard to possible transgene size, ease and safety of use, cellular tropism, and other factors.
Biomechanical studies have also shown that an increased shear force due to facet tropism is a potential risk for lumbar pain, lumbar disc hernia, and degenerative lumbar diseases.
3,32) Biopsy and histologic examination will demonstrate pathogenicity and site tropism.
Co-Receptor tropism assay (genetic assay) CCR5 (with the help of Emcure pharmaceuticals) was done in all of them.
Given those fears, though, and the strength of her aversion, how does the protobehaviorist concept of the tropism come to form the heart of Sarraute's own creative practice?
Theradiag expects to launch the first HIV tropism assay next year.
Monogram Biosciences provided resistance and tropism testing.
According Eiras (2002), the genus Henneguya has already been registered in various organs of lambari, though the gill filaments are the sites with the highest tropism, so has the highest prevalence, but there is no register in the literature of parasites from this genus in the blood of fishes, what permits comprehend the low incidence of parasites in this study.
2000, "Envelope V3 amino acid sequence predicts HIV-1 phenotype (co-receptor usage and tropism for macrophages)", AIDS (London, England), vol.
Wang, "Tumor Tropism of Intravenously Injected Human Induced Pluripotent Stem Cell-derived Neural Stem Cells and their Gene Therapy Application in a Metastatic Breast Cancer Model," Stem Cells, (2012) DOI: 10.
After sifting through the "junk ideation" swirling all around us, Robinson appeals to our "primordial human tropism toward mystery," invites us to look with wonder at the prodigal nature of the human mind, and urges a fuller measure of empathy and generosity toward one another and the communal life we share.