Table 4.
The ferric reducing antioxidant power (FRAP) assay of buds, leaves, petioles, and stems of 11 leafy sweet potato varieties.
| Item | FRAP (μM TE/g fw) | |||
|---|---|---|---|---|
| Bud | Leaf | Petiole | Stem | |
| Variety | ||||
| GSC-2 | 21.94 ± 2.20a | 9.73 ± 0.99b | 3.17 ± 0.07a | 1.68 ± 0.13c |
| GCS-5 | 21.65 ± 3.14a | 10.31 ± 0.69b | 2.80 ± 0.16b | 2.25 ± 0.03b |
| Ziyang | 23.16 ± 3.45a | 12.51 ± 1.58a | 2.76 ± 0.39b | 2.57 ± 0.05a |
| GS-15-28 | 10.25 ± 0.86bcd | 4.17 ± 0.22de | 0.30 ± 0.00f | 0.47 ± 0.04d |
| GS-16-11 | 12.11 ± 0.63b | 9.18 ± 0.40b | 1.18 ± 0.35c | 0.92 ± 0.17d |
| GS-17-3 | 8.46 ± 0.60cd | 4.61 ± 0.39cde | 0.65 ± 0.21def | 0.70 ± 0.05e |
| GS-17-5 | 11.24 ± 1.56bc | 5.76 ± 0.75c | 0.90 ± 0.28cd | 0.85 ± 0.08d |
| GS-17-10 | 10.83 ± 0.27bc | 5.27 ± 0.09cd | 0.62 ± 0.03def | 0.69 ± 0.06e |
| GS-17-21 | 7.59 ± 0.76d | 3.54 ± 0.09e | 0.38 ± 0.10ef | 0.96 ± 0.00d |
| GS-17-22 | 9.91 ± 0.10bcd | 5.21 ± 0.27cd | 0.77 ± 0.07de | 0.90 ± 0.02d |
| GS-17-23 | 3.37 ± 0.44e | 3.91 ± 0.28e | 0.36 ± 0.12f | 0.43 ± 0.05d |
| p value | <0.001 | <0.001 | <0.001 | <0.001 |
| Color | ||||
| Green | 21.80 ± 2.43A | 10.02 ± 0.82A | 2.99 ± 0.23A | 1.96 ± 0.32A |
| Green-purple | 10.77 ± 5.24B | 6.02 ± 2.88B | 0.89 ± 0.77B | 0.94 ± 0.63B |
| p value | <0.001 | <0.01 | <0.001 | <0.001 |
The variety GSC-2 and GCS-5 with green aerial parts, and other nine varieties with green-purple aerial parts. For each variety, different lowercase letters (a, b, c, d, e, f) in a column indicate significant differences among variety means (p < 0.001). Different uppercase letters (A, B) in a column indicate significant differences among color means (p < 0.01).