tropism


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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

(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.
References in periodicals archive ?
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.
Due to their innate capacity for tumor tropism, MSCs derived from various sources, such as the BM and umbilical cord, have been widely studied as delivery vehicles for therapeutic agents in the treatment of various types of cancers [11, 12, 16, 30].
L3-4 measurements in the control group showed no tropism in 87.8% (n=43), moderate tropism in 12.2% (n=6), and severe tropism in 0% (n=0).
Thus, laminar horizontalization over 130[degrees], facet sagittalization between 52.7 and 67.1[degrees], and facet tropism of over 10[degrees] are considered highly predisposing for ASD (Table 2).
Different species appear to have significant differences in site tropism and host fidelity (including zoonotic potential), and it can reasonably be extrapolated that significant differences in pathogenicity are likely.
METHODS: Co-receptor tropism assay was done in total nine patients who were HIV positive attending Mahatma Gandhi Hospital Dermatology & Venereology of Mahatma Gandhi Hospital OPD in one month duration time.
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?
Few would dispute your assertion that "mystery is openness to possibility, even at the scale now implied by physics and cosmology." More than a few would find your idea persuasive that "the primordial human tropism toward mystery may well have provided the impetus for all that we have learned" (197).
Furthermore, the second deal extends an existing agreement between Theradiag's unit Prestizia and the CNRS for the detection of HIV/AIDS tropism via microRNAs to a new research programme on long non-coding RNAs (lncRNAs).
More serotypes of scAAV and markers of kidney development should be tested in cultured kidney, as the cell tropism and transduction efficiency of scAAV serotype are different.
Prostate cancer cells have an exquisite tropism for bone, which clinically translates into the highest rate of bone metastases amongst male cancers.
If one is interested in the latest postmodern urban architects or concerned about urban development in China, this book provides vivid description and value-neutral research tropism with straightforward language.