Effect of AbA, Humidity, and Leaf Temperature on the Stromatal
Response to Light. The addition of AbA to the cyanazine
solution given to leaves of X strumarium reduced stomatal conductance
(inset of Fig. 6) but did not change the pattern of the
relationship between stomatal conductance and irradiance. The
normalized curves representing control, 10-7 M, and 10-6 M (±)-
AbA treatments were indistinguishable from each other (Fig. 6).