phototaxis


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Related to phototaxis: negative phototaxis, positive phototaxis

phototaxis

 [fo″to-tak´sis]
taxis of cells and microorganisms under the influence of light. adj., adj phototac´tic.

pho·to·tax·is

(fō'tō-tak'sis),
Reaction of living protoplasm to the stimulus of light, involving bodily motion of the whole organism toward (positive phototaxis) or away from (negative phototaxis) the stimulus. Compare: phototropism.
[photo- + G. taxis, orderly arrangement]

phototaxis

/pho·to·tax·is/ (-tak´sis) the movement of cells and microorganisms in response to light.phototac´tic

phototaxis

(fō′tō-tăk′sĭs)
n.
The movement of an organism or a cell toward or away from a source of light.

pho′to·tac′tic (-tăk′tĭk) adj.
pho′to·tac′ti·cal·ly adv.

pho·to·tax·is

(fō'tō-tak'sis)
Reaction of living protoplasm to the stimulus of light, involving bodily motion of the whole organism toward (positive phototaxis) or away from (negative phototaxis) the stimulus.
Compare: phototropism
[photo- + G. taxis, orderly arrangement]

phototaxis

the movement of a whole organism in response to a directional light stimulus. For example, movement of unicellular algae or fruit flies towards a source of light is positive phototaxis, while movement away from light if the stimulus is too strong is negative phototaxis.

phototaxis

the movement of cells and microorganisms under the influence of light.
References in periodicals archive ?
imbecillis that had completed their parasitic phase with chironomids (what I referred to as post-chironomid larvae) exhibited negative phototaxis only in the presence of water that had been modified by U.
Understanding phototaxis thus unravels the first steps of eye evolution," he added.
Morphological development in relation to phototaxis and rheotaxis in the striped jack, Pseudocaranx dentex.
Phototaxis and vertical migration of the queen conch (Strombus gigas Linne) veliger larvae.
Such phototaxis may have evolved near the deep-sea vents, where it would have helped early bacteria move toward the chemical nutrients they needed for survival.
Phototaxis in algae has been studied since 1817 (reviewed by Foster and Smyth, 1980).
Phototaxis Solar, Cambridge, MA, will build solar-panel covered roofs over existing parking lots, targeting environmentally-conscious businesses first, saving them the cost of construction and maintenance.
Our data from sticky traps along with our observations suggest a strong phototaxis of adult whiteflies toward sunlight in the morning.
Larval crabs exposed to compound 2 also experienced high mortality and behavioral effects on swimming speed and phototaxis (Forward & Costlow 1976).
PHOTOTAXIS IN WILD-TYPE AND MUTANT CHLAMY-DOMONAS RHEINHARDTII.
The cycle of day-night rhythm and host plant physiology and biochemical characteristics that influence physiologic responses, such as fruit nutrients, phototaxis, attraction and pesticide application (Gould et al.
The host-finding and entry mechanisms used by juvenile stages remain unknown, but some evidence suggests that a combination of (1) positive phototaxis (juveniles show a positively phototactic behavior) (Crespo Gonzalez et al.