XVI International Botanical Congess

Mechanically-induced chloroplast relocation is found in protonemata of a fern Adiantum. In cells received local stimulation by a microneedle, the chloroplasts moved away from the site of stimulation in the dark. In the cells, chloroplast relocation is also induced by both blue and red light. The time required for mechano-relocation was close to that required for photo-relocation. Both movements are suggested to depend on acto-myosin system by drug effects. In this study, we examined the effects of mechanical stimulation in various light conditions to investigate the possible interaction of photo- and mechano- induced signal on chloroplast relocation movement. Further, we will show the mechano-relocation of chloroplasts in various plants.