Thus, Exp-1 had four treatment conditions with 18 pots eachas follows: (1) wetness without the addition of NO3−to the roots(WT), (2) wetness with the addition of NO3−to the roots (WN),(3) rewatering without addition of NO3−to the roots (DT) and (4)rewatering with addition of NO3−to the roots (DN). On the otherhand, Exp-2 had three treatment conditions with nine pots each asfollows: (1) wetness (WB), (2) rewatering (DB) and (3) rewateringwith cytokinin sprayed to the leaves (DC).