University of Poitiers, Station Biologique de Beau-Site, 25 Faubourg Saint-Cyprien, F-86000, Poitiers, France.
Plant Physiol. 1989 Jun;90(2):697-701. doi: 10.1104/pp.90.2.697.
Verapamil and nifedipine, known as calcium channel blockers, inhibited the phytochrome-mediated movements induced on Cassia fasciculata leaflets by a light-off signal, whereas they had no effect on the ;blue' pigment-mediated movements induced by a light-on signal. LaCl(3) inhibited both types of reactions, but the inhibition of light-induced opening needed a 10 times higher concentration than that of dark-induced closure. Bay K 8644, an activator of calcium channels, increased the rate of dark-induced closure, whereas it had no effect on the light-induced opening. These data suggest that calcium ions are not mobilized in the same way in the two types of movements: possibly from external stores in the phytochrome-mediated reaction and from internal stores in the ;blue' pigment-mediated reaction.
维拉帕米和硝苯地平，又称钙通道阻滞剂，抑制了光信号诱导的决明子小叶运动的光敏素介导运动，而对光信号诱导的“蓝”色素介导运动没有影响。LaCl(3)抑制了这两种反应，但抑制光诱导的开放需要比暗诱导的关闭高 10 倍的浓度。钙通道激活剂 Bay K 8644 增加了暗诱导关闭的速率，而对光诱导的开放没有影响。这些数据表明，钙离子在两种运动中不是以同样的方式动员的：可能在光敏素介导的反应中从外部储存库中动员，而在“蓝”色素介导的反应中从内部储存库中动员。
