Table 1.
Average values of resting potential (RP) and parameters describing the electrically evoked action potentials in the same internodal Nitellopsis obtusa cells in the control solution APW and after treatment with 300 µM verapamil, 100 µM tetrandrine, and 75 µM NED-19. Asterisks indicate a statistically significant difference (p < 0.05).
| APW | Verapamil 300 µM | APW | NED-19 75 µM | APW | Tetrandrine 100 µM | |
|---|---|---|---|---|---|---|
| RP (mV) | −210 ± 11 (n = 7) |
−140 ± 62 (n = 7)* |
201 ± 15 (n = 7) |
−155 ± 33 (n = 7)* |
−203 ± 21 (n = 6) |
−165 ± 44 (n = 6)* |
| Eth (mV) | −101 ± 12 (n = 7) |
−73 ± 35 (n = 7)* |
−108 ± 9 (n = 7) |
−81 ± 20 (n = 7)* |
−78 ± 18 (n = 6) |
−80 ± 17 (n = 6) |
| Vmax (mV) | 36 ± 14 (n = 7) |
37 ± 24 (n = 7) |
35 ± 10 (n = 7) |
27 ± 25 (n = 7) |
30 ± 4 (n = 6) |
32 ± 6 (n = 6) |
| Ath (mV) | 137 ± 21 (n = 7) |
110 ± 52 (n = 7) |
143 ± 10 (n = 7) |
107 ± 31 (n = 7)* |
107 ± 18 (n = 6) |
112 ± 18 (n = 6) |
| ARP (mV) | 254 ± 14 (n = 7) |
178 ± 79 (n = 7)* |
231 ± 17 (n = 7) |
181 ± 33 (n = 7)* |
233 ± 21 (n = 6) |
197 ± 42 (n = 6) |
| tdep (s) | 0.8 ± 0.1 (n = 7) |
1.6 ± 0.7 (n = 7)* |
0.9 ± 0.1 (n = 7) |
1 ± 0.2 (n = 7) |
1.3 ± 0.2 (n = 6) |
1.9 ± 0.3 (n = 6)* |
| trep (s) | 2.6 ± 0.7 (n = 7) |
8 ± 8.6 (n = 7)* |
3.5 ± 1.2 (n = 7) |
6 ± 3.4 (n = 7) |
2.6 ± 0.8 (n = 6) |
8.2 ± 3.9 (n = 6)* |
| t1/2 (s) | 3.5 ± 0.8 (n = 7) |
9.6 ± 9.2 (n = 7)* |
4.4 ± 1.2 (n = 7) |
6.9 ± 3.4 (n = 7)* |
3.9 ± 0.9 (n = 6) |
10.1 ± 4 (n = 6)* |