Table 2.
Total phenolic content (TPC) and antioxidant activity (ABTS, DPPH, and FRAP) results of the undigested and digested wild and micropropagated Genepì infusions results and Pearson’s correlation coefficients between the different antioxidant activity assays and the total phenolic content.
| TPC | ABTS | DPPH | FRAP | |||||||||
| (mg GAE g−1 dw) | (IC50) | (IC50) | (mg TE g−1) | |||||||||
| U | D | p -Value | U | D | p -Value | U | D | p -Value | U | D | p -Value | |
| Wild Genepì | 11.48 | 14.13 | *** | 1.56 | 4.11 | * | 2.70 | 4.64 | *** | 23.62 | 5.68 | ** |
| Micropropagated Genepì | 5.29 | 7.86 | *** | 1.83 | 4.13 | * | 3.37 | 4.88 | *** | 16.26 | 5.49 | ** |
| p-value | ** | ** | *** | ns | ns | ns | *** | ns | ||||
| Pearson’s correlation coefficient | ||||||||||||
| Assay | ABTS | DPPH | FRAP | |||||||||
| TPC | 0.33 | 0.12 | −0.13 | |||||||||
TPC, total phenolic content; ABTS, antioxidant activity estimated with 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid; DPPH, antioxidant activity estimated with 2,2-diphenyl-1-picrylhydrazy; FRAP, ferric-reducing antioxidant power; U, undigested; D, digested. Statistical significance (p-value) was calculated according to the Student t-test (* p < 0.001, ** p < 0.01, and *** p < 0.05). In columns are reported the statistical significance between the wild and micropropagated undigested/digested results. In rows are reported the statistical significance between the undigested and digested results of wild/micropropagated Genepì. For the Pearson’s correlation coefficients, the positive/negative strength of a correlation was considered: low for ±0.1 < r < ±0.3, moderate for ±0.3 < r < ±0.7, and strong for r > ±0.7; for values of r < ±0.1, the variables were considered not correlated.