Table 2.
Effect of Glu and γ-PGA on the antioxidant enzyme activity and superoxide radical production under heat stress.
| Treatments | Antioxidant Enzyme (U·g−1 FW) | Superoxide Radical Content (μmol·g−1 FW) | |||
|---|---|---|---|---|---|
| SOD | APX | CAT | POD | O2·− | |
| Ctrl | 255.31 ± 0.32 b | 0.56 ± 0.13 b | 333.44 ± 0.12 b | 32.29 ± 1.45 b | 23.39 ± 0.82 a |
| Glu | 303.98 ± 0.61 a | 0.72 ± 0.29 a | 447.44 ± 0.21 a | 46.97 ± 1.93 a | 15.65 ± 0.19 c |
| PGA | 289.29 ± 0.75 a | 0.71 ± 0.28 a | 444.19 ± 0.18 a | 44.90 ± 1.93 a | 18.12 ± 0.16 b |
Note: seedlings were foliar sprayed with water (Ctrl), Glu (Glu), or γ-PGA (PGA), followed by exposure to high temperature. Each value represents the mean ± SD. Different lowercase letters of the same column indicate significant difference at p < 0.05.