ABA concentration of tomato seedlings
As expected, the level of ABA was significantly increased in all
four treatments under water stress (Fig. 2). The ABA concentration
was dramatically increased in AC plants treated by water and EBR after water cessation. However, the ABA concentration of AC
plants treated by EBR was significantly higher than those treated
by water. In addition, EBR-induced increase in ABA is earlier (at the
1st day) than the water stress-induced increase in ABA (at the 2nd
day) (Fig. 2).
A slight increase in ABA levels was observed in the not plants,
treated by water and EBR on the 2nd and 3rd day of water stress
(Fig. 2). Although not plants treated by EBR contained higher levels
of ABA than those treated by water, the increasing rate and amplitude
of ABA in not plants treated by EBR was significantly lower
than those in AC plants.