Figure 4.

The role of for in olfactory learning is dependent on training experience. (A) Increasing the number of pairings between odor and reward from three to eight 1-min pairings significantly increases LI of sitter larvae such that for^R, for^s, and for^s2 do not show significant differences in LI (17–18). (B) for^R larvae show significantly greater LI than for^s and for^s2 larvae 30 min after training when trained with three 1-min pairings between odor and reward (16–17). (C) for^R larvae show significantly smaller LI than for^s and for^s2 larvae 30 min after training when trained with eight 1-min pairings between odor and reward (n = 17/strain). (D) When the data from Figures 1C and 4A–C are replotted, it becomes apparent that for^R larvae show higher learning indices when trained with three training trials, whereas for^s and for^s2 larvae show higher learning with eight training trials: this effect is seen both for immediate retentions (left) and 30-min retention (right). This data suggests that for plays a role in the timescale of memory acquisition and retention.