contentResults of Exp-1 indicated that drought stress increased theroot soluble carbohydrate content and root activity. A significantlyhigher soluble carbohydrate content of roots and root activity wereobserved in DT than in WT and in DN than in WN during the droughtstress period (Fig. 3). At 5 days after rewatering, the soluble carbo-hydrate content of roots was significantly higher in DN than in WNand in DT than in WT. However, at 10 days after rewatering, no sig-nificant difference for the in root soluble carbohydrate content wasfound between them. Therefore, rewatering could decrease the sol-uble carbohydrate content of roots over time. At 5 days and 10 daysafter rewatering or during the drought stress period, root activitywas significantly higher in DN than in WN and in DT than in WT,which indicated that drought stress could increase root activity,and this role lasted for some time after rewatering.