Plant Physiology - Musiyenko M.M. 2001

Plant Movements
Taxes

The movement of an entire Cell or Organism, i.e., a locomotory response caused and determined by a specific external factor, is called a taxis. The movement can be directed toward the stimulus—for example, a chemical one, in which case it is positive chemotaxis—or away from it—negative taxis. An example of phototaxis, which is a response to light, is the movement of Euglena toward illumination or the movement of METABOLISM/14.html">Chloroplasts within a cell. Positive chemotaxis is seen when the spermatozoa of liverworts, mosses, and ferns move toward substances secreted by the egg cell. Aerotaxis occurs when motile aerobic Bacteria move toward oxygen.



Last update: 07/08/2026

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