Figure 7.

Reporter response in Arabidopsis rosette plant. The pAtHB6::LUC reporter plants cultivated for 4 weeks under sterile conditions were exposed to water stress (Ψ = −1.0 MPa) via their root system for 24 h prior to in vivo measurement of reporter activity shown in false colors (A) for a single plant and the corresponding brightfield image (B). Comparatively developed and nonstressed plants served as a control and revealed only background LUC activity, while p35S::LUC transgenic plants showed high reporter activity in root and shoot (not shown). Color code is as introduced in Figure 4. The scale bars correspond to 1 cm.