抄録
Our experiment concerning the effect of light stimulation and action current on the sweet-potato was carried on in conjunction with a study related to bud inhibition mechanism. Statements concerning the effect of inhibitory substance in apex upon lateral buds have been generally accepted but it seemed to us somewhat ambigous. As it is no doubt that the growth of lateral buds involves the physiology of the root primordia, it seemed desirable to determine whether the increased conductivity obtained with decapitated sedling is primarily due to the facilitation of exchange of favorable materials and water through the bud and root primordia. The sequence of the responses of the swet-potatoes to heat-stimulation are summarized. The nature of this experiment is such that the magnitude of action current after the removal of apex is of prime significance. A conduction of excitement betwen lateral bud and roots is established immediately after removal of apex (0.3 cm∼0.5 cm) without any morphological evidence for growth promotion (Fig. (B) and Fig. (D)). Interesting results come from Fig.3 (D). The action current is in parallel with that of the rest before and after decapitation of apical region.
