Antioxidant activity is given as a percentage of DPPH scavenging
activity. Water deficit did not significantly affect DPPH scavenging
activity (Table 1); therefore, there was no correlation between
water deficit and antioxidant activity (Table 2). The percentages of
DPPH scavenging activity ranged from 47.61 to 54.85%. The highest
antioxidant activity, present after the 120-day water deficit, may
have resulted from an increase in volatile oil content, as previously
found by Lertsatitthanakorn et al. (2006).