Changes in the extracellular ion concentration in the main pulvinus of Mimosa pudica during rapid movement and recovery

概要

論文の詳細を見る
A decrease in electric resistance and an increase in the extracellular Cl^- concentration ([Cl^-]) in the main pulvinus of Mimosa occurred immediately after the action potential of the motor cells. The beginnings of both changes were almost coincidental with the beginning of the rapid movement. A remarkable increase in [Cl^-] was seen in the lower half of the pulvinus, but only a slight increase in the upper half. Release of Cl^-, probably with K^+ and other ions, from the motor cells implies an ejection of liquid from the vacuole. When recovery of the pulvinus following rapid movement was fast in light, [Cl^-] decreased to its initial level within 20 min. When the recovery was slow in darkness, [Cl^-] decreased at a slow rate and maintained a higher level than its initial one for a long time. Photosynthetic inhibitors delayed recovery and the decrease in [Cl^-] even in light. These facts suggest that the re-entry of ions into motor cells during recovery partially requires a photosynthetic energy supply.
日本植物生理学会の論文