Abscisic acid (ABA) is synthesized in the roots in response to decreased soil water potential. ABA then translocates to the leaves, where it rapidly alters the osmotic potential of guard cells. What effect would this have on the stomata and the process of transpiration?
A. The change in the stomata would have no effect on the rate of transpiration.
B. The stomata would close thereby increasing the rate of transpiration.
C. The stomata would close thereby decreasing the rate of transpiration.
D. The stomata would open thereby decreasing the rate of transpiration.
E. The stomata would open thereby increasing the rate of transpiration.
Answer: C
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