University of Wisconsin, Madison, Wisconsin 53706.
Plant Physiol. 1969 Nov;44(11):1542-6. doi: 10.1104/pp.44.11.1542.
The effect of light on the stomatal resistance of abaxial and adaxial leaf surfaces of snap beans (Phaseolus vulgaris L.) was studied in the growth chamber and in the field. The adaxial stomata required more light to open than the abaxial stomata; the abaxial stomatal apertures were still about 50% open at 1% full sunlight and light-induced closure was never observed under daytime field conditions. A given value of abaxial stomatal resistance was obtained at a given illumination of the abaxial guard cells whether illumination was adaxial or abaxial.
在生长室和田间条件下研究了光对菜豆（Phaseolus vulgaris L.）下表皮和上表皮气孔阻力的影响。与上表皮气孔相比，下表皮气孔需要更多的光才能打开；在 1%全日照下，下表皮气孔开度仍保持在 50%左右，并且在白天田间条件下从未观察到光诱导关闭。无论光照来自上表皮还是下表皮，只要下表皮保卫细胞接受一定的光照，就可以获得一定的下表皮气孔阻力值。
