Bacterial Behavior S Prokaryotes encounter gradients of physica/V Chemotaxis, Phototaxis, and other axes and chemical agents in nature, and the motility machinery in the cell is designed to respond in a positive or negative way to these gradients by directing the movement of the cell either toward or away from the signal molecule respectively Such directed movements are called TAXis Chemotaxis: a response to chemicals Phototaxis: a response to light
Bacterial Behavior Chemotaxis, Phototaxis, and Other Taxes • Prokaryotes encounter gradients of physical and chemical agents in nature, and the motility machinery in the cell is designed to respond in a positive or negative way to these gradients by directing the movement of the cell either toward or away from the signal molecule, respectively. • Such directed movements are called TAXiS. • Chemotaxis: a response to chemicals. • Phototaxis: a response to light
Chemotaxis in Bacteria Chemotaxis is the Attractant movement of an Cells per tube organism toward(an attractant) or away from Repellent (a repellent)a chemical
Chemotaxis in Bacteria • Chemotaxis is the movement of an organism toward (an attractant) or away from (a repellent) a chemical