Cation transporters are highly up-regulated in active traps. (A) Coronatine-induced expression kinetics based on qPCR data of ammonium (DmAMT1; left), potassium (DmHAK5; middle), and sodium (DmHKT1; right) transporters and time course of membrane potential depolarizations in gland cells in response to either 6 mM NH4+, 3 mM K+, or 12 mM Na+. (B) Effect of the JA-antagonist COR-MO on transcript levels of ammonium (DmAMT1; left), potassium (DmHAK5; middle), and sodium (DmHKT1; right) transporters in response to 60 elicited APs. Traps were pretreated with H2O (light gray) or 100 μM COR-MO (dark gray) for 4 h before imposition of APs. Transcript numbers are given relative to 10,000 molecules of DmACT1 ± SE, n = 6. Experimental conditions were as described for Figure 4D.
