J. Eckstein et al., ABSCISIC-ACID IS NOT NECESSARILY REQUIRED FOR THE INDUCTION OF PATCHYSTOMATAL CLOSURE, Journal of Experimental Botany, 49(320), 1998, pp. 611-616
Patchy stomatal closure was observed in leaves of transgenic plants of
Nicotiana plumbaginifolia producing antibodies that block the action
of abscisic acid, Stomatal patchiness was induced by leaf detachment a
nd subsequent water loss, Stomatal closure was followed by an irrevers
ible reduction of maximal chlorophyll fluorescence, The degree of devi
ation from the A/c(i)-curve is correlated with steady-state diffusion
conductance before leaf detachment, It is concluded that a heterogeneo
us sensitivity of stomata to abscisic acid is not directly involved in
the induction of patchy stomatal closure.