Figure 1.

Growth kinetics of two‐day‐old etiolated Arabidopsis hypocotyls containing mutations in two‐component signaling elements. Short‐term growth kinetic analysis in response to 10 μl/L ethylene was performed on mutants involving receptors (column 1), AHPs (column 2), and type‐B ARRs (column 3) and compared to the wild type. Ethylene was introduced one hour after measurements were initiated (down arrow) and then removed two hours later (up arrow). For receptor mutants, we examined the etr1‐7 mutant as well as ahk double mutants. For ahp mutants, we examined ahp5‐2, ahp2 ahp3, and ahp2 ahp3 ahp5‐2. For type‐B arr mutants, we examined arr2‐4, arr10‐2 arr12‐1, and arr2‐2 arr10‐2 arr12‐1. Error bars indicate SE (n ≥ 3)