Figure 7.

Ethylene Inhibitors Reduce Low Potassium-Induced Expression of HAK5, whereas Chemicals That Stimulate Ethylene Production Increase HAK5 Expression in Arabidopsis Roots, even under Nutrient-Sufficient Conditions.

Pseudocolored luminescence images of homozygous transgenic Arabidopsis seedlings transformed with HAK5pro:LUC. Orange part of the illustration at the top shows the root region that was imaged for (A) and (B). Three-day-old seedlings were incubated with ethylene inhibitors (Ag⁺, AVG, and AIB) or an NADPH oxidase inhibitor (DPI) for the times indicated in the figure, or with an ethylene producer (ethephon) for 6 h, under K⁺-sufficient (+K, 5 mM K⁺) and K⁺-deficient (−K, no K⁺) conditions. Yellow and red colors indicate a high luciferase expression. Experiments were performed three times, and data from one experiment are shown here.