Table 1.
Trolox equivalent antioxidant capacity (TEAC) by 2,2′-azinobis (3-ethylbenzothiazoline-6-sulphonic acid) diammonium salt (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) methods, total phenolics (TotP), non-tannic phenolics (NTP), tannic phenolics (TP), total flavonoids (TotF) in leaves of the examined accessions of Parthenium argentatum harvested at 30 (winter) or 33 months (spring) after transplanting.
| TEAC (mmol 100 g−1 DW) | TotP (g GAE kg−1 DW) |
NTP (g GAE kg−1 DW) |
TP (g GAE kg−1 DW) |
TotF (g CE kg−1 DW) |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ABTS | DPPH | |||||||||||||||||
| Winter | Spring | Winter | Spring | Winter | Spring | Winter | Spring | Winter | Spring | Winter | Spring | |||||||
| AZ-1 | 23.2 ± 1 | 20.2 ± 1a | ns | 27.4 ± 0.4b | 21.3 ± 0.6a | * | 181.9 ± 2a | 167.4 ± 7b | ns | 129.7 ± 4 | 108.2 ± 1b | ns | 52.2 ± 7 | 59.2 ± 8 | ns | 39.5 ± 2b | 40.7 ± 1b | ns |
| AZ-2 | 23.1 ± 0.9 | 20.8 ± 1a | ns | 23.3 ± 2a | 25.6 ± 2b | ns | 172.3 ± 7a | 186.6 ± 8b | ns | 113.4 ± 6 | 115.6 ± 5b | ns | 58.9 ± 4 | 71.0 ± 13 | ns | 25.9 ± 2a | 43.8 ± 1b | * |
| P803 | 25.1 ± 1 | 17.2 ± 2a | * | 29.3 ± 0.8b | 20.8 ± 1.5a | * | 203.7 ± 7b | 147.1 ± 6a | * | 124.1 ± 6 | 84.0 ± 8a | * | 79.5 ± 10 | 63.1 ± 5 | ns | 39.2 ± 3b | 31.5 ± 4a | * |
| 11591 | 26.7 ± 0.4 | 23.5 ± 0.8b | ns | 27 ± 0.6b | 27.8 ± 0.4b | ns | 183.4 ± 2a | 198.7 ± 3b | ns | 128.8 ± 8 | 130.9 ± 8b | ns | 58.4 ± 14 | 67.6 ± 6 | ns | 38.8 ± 2b | 41.8 ± 2b | ns |
| Avg. | 22.5 | 25.3 | 180.1 | 116.8 | 63.7 | 37.6 | ||||||||||||
| G × H | ns | ** | ** | * | ns | ** | ||||||||||||
In the columns of each harvest (H) time (winter and spring), means followed by the same letter are not significantly different at p ≤ 0.05. In the rows, least significant differences test indicates harvest time effect on each examined accession of Parthenium argentatum. G × H: interaction between genotype and season of harvest. ns, not significant; ** p ≤ 0.001, * p ≤ 0.05.