Studies on the Leaf Movement of Aldrovanda vesiculosa L.

III. Reaction Time in Relation to Temperature

抄録

Reaction times of many leaves of Aldrovanda are measured at various temperatures, using cinematography. When the stimulus is not strong, the frequency distribution diagrams of reaction times are skewed extremely to the left, every diagram showing two conspicuous modes at its left side (Figs. 2 and 3). The positions of the modes are affected by temperature in accordance with the BELEHRÁDEK formula. When the stimulus is strong, almost all the leaves show reaction times which correspond to the first mode of the case of the weak stimulation (Table 2). Possible causes are suggested.