Abstract
Bacterial chemotaxis is the process by which bacteria sense and respond to environmental stimuli. While the mechanism for chemotaxis has been extensively studied in enteric bacteria, studies in soil bacteria that are attracted to aromatic acids and aromatic hydrocarbons in addition to sugars and amino acids are lacking. Here we describe detailed protocols for the quantitative and qualitative assessment of chemotaxis responses to analyze responses to hydrocarbon and aromatic acid attractants to identify the specific receptors involved.