Department of Biology, Yale University, 06520, New Haven, CT, USA.
Planta. 1976 Jan;132(1):25-9. doi: 10.1007/BF00390327.
Microelectrodes were used to demonstrate two electrical responses which occur in oat (Avena sativa L.) coleoptile parenchyma-cells during exposure to red light. The membrane potential of these cells depolarized 5-10 mV in several seconds in red light and repolarized more slowly in far-red light. By pulsing current through the cells, it was found that cellular coupling along the longitudinal axis of the coleoptile increased about 2-fold in red light, but that coupling along the lateral axis was not affected. The rapid changes in membrane potential are consistent with the idea of a membrane locale for early phytochrome action. The coupling experiments suggest that phytochrome may also affect plasmodesmata in this system.
微电极被用于展示在暴露于红光下时，燕麦（Avena sativa L.）胚芽鞘薄壁细胞中发生的两种电响应。这些细胞的膜电位在红光中几秒钟内去极化 5-10 mV，并在远红光中更缓慢地复极化。通过在细胞中脉冲电流，发现细胞沿着胚芽鞘的纵轴的偶联增加了约 2 倍，但沿着横向轴的偶联没有受到影响。膜电位的快速变化与早期光敏色素作用的膜定位的观点一致。偶联实验表明，在该系统中，光敏色素也可能影响胞间连丝。
