Chemotaxis Away from 4-Chloro-2-nitrophenol, 4-Nitrophenol, and 2,6-Dichloro-4-nitrophenol by Bacillus subtilis PA-2

Figure 1

Drop plate assay demonstrating negative chemotaxis of (a) 4-chloro-2-nitrophenol, (b) 4-nitrophenol, and (c) 2,6-dichloro-4-nitrophenol by Bacillus sp. strain PA-2. In the control (d), there was no chemotaxis away from 4-chloro-2-nitrophenol by the heat-killed cells of strain PA-2.

(a)

(b)

(c)

(d)