In looking over a series of reviewsby various authors (Pickard 1973, Si-mons 1981, Roblin 1985, Davies1987, Lou 1991) on plant electro-physiology, we come to the convictionthat electrical wave transmission is ofuniversal existence。In general, twokinds of electrical responses to stimula-tion have been distinguished: the ac-tion potential (AP) transmission in re-
