Area(s) of Expertise
Working primarily with sunflower, we have been able to show differences between the genuine electrical signal (action potential, AP) and the hydraulic signal with its local electrical aftermath (variation potential, VP). The AP is evoked most readily by electrical stimulus and is transmitted with almost constant velocity and magnitude and electrical changes precede minor tissue deformations. In contrast, the VP is evoked most readily by flame-wounding and the change in tissue deformation precedes, and appears to elicit, changes in membrane potential which decrease with distance from the region stimulated.
2. Transcriptional and translational responses to stress signals. Working primarily with tomato, we have shown that both the AP and the VP induce the accumu