Table 2 Changes in antioxidant characteristics of Amaranth cauline leaf according to growth
| Stem length(cm) | DPPH(IC501), μg/mL) | ABTS(IC50, μg/mL) | Reducing power(OD) | Total phenol(mg GAE/g) | Total flavonoid(mg CE/g) |
| 10 | 1,041.38±84.52h | 2,172.74±125.76g | 0.158±0.009b | 196.54±19.02b | 539.00±8.29b |
| 15 | 310.10±17.74b | 798.37±54.08b | 0.289±0.000e | 201.40±10.85b | 785.25±13.84e |
| 20 | 279.87±16.77b | 1,013.14±99.19c | 0.216±0.000d | 203.86±4.99b | 707.50±15.97c |
| 25 | 525.11±26.84c | 1,408.18±55.38d | 0.157±0.001a,b | 175.66±12.53b | 745.00±11.53d |
| 30 | 566.86±10.43d | 1,735.85±46.49e | 0.151±0.000a | 177.21±25.54b | 714.75±12.09c,d |
| 35 | 654.48±19.22e | 2,056.30±78.39f | 0.164±0.000c | 177.74±18.17b | 721.33±42.25c,d |
| 40 | 743.36±38.24f | 2,391.15±27.96h | 0.159±0.003c | 146.28±16.68a | 559.00±40.32b |
| 45 | 812.16±38.12g | 2,672.61±51.68i | 0.152±0.000ab | 138.27±1.10a | 368.75±10.21a |
| F-value (p-value) | 543.43 (0.000)*** | 1,021.65 (0.000)*** | 3,586.71 (0.000)*** | 8.336 (0.000)*** | 153.79 (0.000)*** |
1) The IC50 values were calculated by linear regression analysis.
a-i Values with different small letters within a column differ significantly (p<0.001).
Values are the mean±SD.
OD, optical density; GAE, gallic acid equivalent; CE, catechin equivalent.