MSU/AEC Plant Research Laboratory, Michigan State University, East Lansing.
Planta. 1971 Dec;101(4):287-95. doi: 10.1007/BF00398115.
The correlation between stomatal action and potassium movement in the epidermis of Zea mays was examined in isolated epidermal strips floated on distilled water. Stomatal opening in the isolated epidermis is reversible in response to alternate periods of light or darkness, and is always correlated with a shift in the potassium content of the guard cells. K accumulates in guard cells during stomatal opening, and moves from the guard cells into the subsidiary cells during rapid stomatal closure. When epidermal strips are illuminated in normal air, as against CO2-free air, the stomata do not open and there is a virtually complete depletion of K from the stomatal apparatus. In darkness CO2-containing air inhibits stomatal opening and K accumulation in guard cells, but does not lead to a depletion of K from the stomata as observed in the light.
我们研究了玉米叶片表皮分离薄片在蒸馏水上漂浮时，气孔运动和表皮细胞中钾离子运动之间的关系。在分离的表皮薄片中，气孔对光照和黑暗的交替有可逆的反应，而且总是与保卫细胞中钾离子含量的变化相关联。在气孔张开时，钾离子在保卫细胞中积累，而在气孔迅速关闭时，钾离子从保卫细胞转移到副卫细胞。当表皮薄片在正常空气中（含二氧化碳）而不是在无二氧化碳空气中被照射时，气孔不会张开，而且气孔器中的钾离子几乎完全耗尽。在黑暗中，含二氧化碳的空气抑制了气孔的张开和保卫细胞中钾离子的积累，但不会像在光照下那样导致钾离子从气孔中耗尽。
