Table 2.

Time Required for the Photoinduction of Cytoplasmic Motility in Epidermal Cells of Vallisneria

Experiment 1Experiment 2
Order of Image
 Processing (s)Number of
 Samples
 RespondingOrder of Image
 Processing (s)Number of
 Samples
 Responding
1 (0.25 to 1.85)0
2 (0.45 to 2.05)01 (0.5 to 2.1)0
3 (0.65 to 2.25)42 (0.7 to 2.3)1
4 (0.85 to 2.45)13 (0.9 to 2.5)2
5 (1.05 to 2.65)04 (1.1 to 2.7)1
6 (1.25 to 2.85)15 (1.3 to 2.9)3
7 (1.45 to 3.05)06 (1.5 to 3.1)1
Later6Later5
  • Dark-adapted samples were irradiated with red light either for 0.25 s at 6500 μmol·m−2·s−1 (experiment 1) or for 0.5 s at 2600 μmol· m−2·s−1 (experiment 2). Immediately after the termination of the irradiation, optical images were recorded sequentially under IR at intervals of 0.2 s. From sets of nine serial images, the individual processed images were obtained sequentially at intervals of 0.2 s. After such processed images were arranged sequentially as in Figure 4, the image with the first detectable change in the index of cytoplasmic motility was determined.