Gravistimulation-induced changes in current patterns around root caps

Changes in the electric current patterns around the root cap of corn following gravistimulation were determined using a vibrating probe. A transient increase in upward current in the cap was found following stimulation. The response began with a time lag similar to the presentation time, and was limited to the area of the root cap lateral to the statocytes. A physiological response as rapid as that reported by Behrens et al. (1985) was not observed.