FIGURE 4.

Dose–response recordings evoked by salt and bitter compounds in the TIβ, and TII gustatory sensilla associated with the fifth tarsomere of female S. littoralis. (A–C) Typical recordings from TIβ sensilla to gradient concentrations of NaCl (1.0–1000 mM); caffeine (0.1–10 mM), and quinine (0.01–1.0 mM). Whereas, the dose responses properties of TII sensilla against the same tastants are represented in (D–F). The bitter compounds were dissolved in 10 mM NaCl as an electrolyte. The time panel of each trace is 2 s (Scale bars: 200 ms).