影响钙通道的化合物对决明子叶枕中光敏色素和蓝光色素介导的运动的影响。
Effects of Compounds Affecting Calcium Channels on Phytochrome- and Blue Pigment-Mediated Pulvinar Movements of Cassia fasciculata.
机构信息
University of Poitiers, Station Biologique de Beau-Site, 25 Faubourg Saint-Cyprien, F-86000, Poitiers, France.
出版信息
Plant Physiol. 1989 Jun;90(2):697-701. doi: 10.1104/pp.90.2.697.
Abstract
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.
摘要
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。
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