Abstract
When plants suffered wounding, they generate electrical signals. Characeae is a suitable material for this study because of simple morphology. Using Chara corallina, I developed a system to analyze the response. Specimens composed of two tandem internodal cells were prepared. When one cell (victim cell) was kiled by cutting, another cell (receptor cell) generated two kinds of resposnes: rapid depolarization and long-lasting depolarization. My previous study showed that the latter resposne is induced by potassium released from vicitim cell. In the present study, analysis was carried out with special interests in the rapid response. I hyothesized that loss of turgor pressure of the victim cell upon killing may induce the rapid response. When 1 M methanol was added to the external medium of the victim cell, the recepor cell generated a rapid spike similar to that generarated upon cutting the victim cell.
