Effects of N_2 Gas on Electrical Potential at the Surface of Pulvinule and Leaflet Movement in Phaseolus vulgaris L.

在缺氧条件下对菜豆粗叶进行照射，研究其表面电位与小叶运动的关系。同时测定了小叶角和上下表面电位的变化。当空气被氮气气体取代时，在pulvinule的两个表面都发生了快速的电势极化。白光照射下，在无氧的情况下，小叶运动受到抑制。然后，虽然在空气中发生了快速和大的极化，但由于辐照引起的上表面电势去极化。在缺氧条件下，与空气中相似，白光和绿光照射蒲曲叶比蓝光和红光照射使小叶运动更多。这两种光照射在蒲曲叶上表面和下表面的去极化作用差异很大，而蓝光和红光照射的去极化作用几乎相同。

Pulvinule of Phaseolus vulgaris L was irradiated under anoxic condition to estimate a relation between electrical potential at surface of the pulvinule and leaflet movement. Changes of leaflet angle and electrical potential at the upper and lower surfaces of pulvinule were simultaneously measured. When the air was replaced with N_2 gas, rapid polarization of electrical potential occurred at both the surfaces of pulvinule. When the pulvinule was irradiated by white light, the leaflet movement was inhibited in the absence of O_2. Then, depolarization of electrical potential at the upper surface caused by the irradiation, although rapid and large polarization occurred in the air. Irradiation with white and green light to the pulvinule under anoxia condition, similarly in the air, let more leaflet movement than that with blue and red light Largely different depolarization by these irradiations occurred between at the upper and lower surfaces of pulvinule, but that by blue and red lights were almost the same.