Definition of Phototactic. Meaning of Phototactic. Synonyms of Phototactic

Here you will find one or more explanations in English for the word Phototactic. Also in the bottom left of the page several parts of wikipedia pages related to the word Phototactic and, of course, Phototactic synonyms and on the right images related to the word Phototactic.

Definition of Phototactic

Phototactic
Phototaxis Pho`to*tax"is, Phototaxy Pho"to*tax`y, n. [NL. phototaxis; photo- + Gr. ? an arranging.] (Biol.) The influence of light on the movements of low organisms, as various infusorians, the zo["o]spores of certain alg[ae], etc.; also, the tendency to follow definite directions of motion or assume definite positions under such influence. If the migration is toward the source of light, it is termed positive phototaxis; if away from the light, negative phototaxis. -- Pho`to*tac"tic, a. -- Pho`to*tac"tic*al*ly, adv.

Meaning of Phototactic from wikipedia

- chemotaxis except that the attractant is light rather than a chemical. Phototactic responses are observed in many organisms such as Serratia marcescens...
- phototactic behavior exhibited by many species of fish that are either attracted by the light themselves, or have come to prey upon any phototactic invertebrates...
- of this behaviour is phototactic behavior (movements of entire organisms to, or away from, a light source). In D. magna phototactic behavior has an innate...
- larva is still phototactic, even if the larval eyes are ablated. But if the adult eyes are ablated, then the nectochaete is not phototactic anymore and thus...
- intensity. Phototactic microorganisms move according to the direction of the light within the environment, such that positively phototactic species will...
- Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms. Some examples are rhodopsin...
- carp and in three cichlid species. Fish use NIR to capture prey and for phototactic swimming orientation. NIR sensation in fish may be relevant under poor...
- Phototaxis can be positive or negative depending on the light intensity. The phototactic pathway consists of four steps leading to a change in the beating balance...
- direction and make directed turns, but their phototactic movement is very slow. Some bacteria and archaea are phototactic. In most cases the mechanism of phototaxis...
- ability to perceive direction of incoming light) allows for more complex phototactic responses to light, and likely evolved by means of membrane stacking...