Fig. 3.

Response ratio (R_r) of leaf minimum conductance (g_min) plotted against the number of galls for cone, flat and pit types separately on a log–log scale. Filled symbols denote leaves with only closed galls (still immature psyllids were growing in the galls) and open symbols denote leaves with one or more opened galls (some immatures had already left). ‘No gall’ symbols represent response ratios calculated between two intact leaves (mean ± s.d.). Solid regression lines indicate significant relationship (P < 0.05).