Table 2: Precarthamin and carthamin contents ( g/g DW) and antioxidant capacities in flowers of C. tinctorius at two Tunisian regions at flowering stage.

CompoundContent ( g/g DW)RegionAntioxidant activity
FRAPADPPHBChelating powerC

Carthamin42.05 ± 1.52aBeja210.33 ± 0.25a1.23 ± 0.12b9.23 ± 0.20b
25.97 ± 0.72bTunis166.01 ± 0.55b1.86 ± 0.55a10.88 ± 0.06a
Precarthamin902.41 ± 1.52aBeja98.26 ± 0.01a2.98 ± 0.54b11.01 ± 0.29b
789.86 ± 0.78bTunis72.14 ± 0.58b4.01 ± 0.01a15.89 ± 0.28a

Synthetic antioxidants

BHT 16.00 ± 0.02
EDTA100.00 ± 0.01
Blank52.11 ± 0.01

The FRAP values were expressed in TE M/mL and B,CIC50 values were expressed in g/mL. Data are reported as means ± SD ( ) and compared to control (C). ANOVA is followed by Duncan multiple range test ( ). Values in the same column with different superscripts (a-b) are significantly different at .