Table 3.
Effects of Mg application on enzyme activities of C metabolism in fruit (NAD+-SDH, SOX, SS-c, NI and AI) and leaf (SS, SPS, S6PDH).
| Year | Treatment (kg/hm2) | Enzyme activities in fruit [µmol·g-1·h-1] | Enzyme activities in leaf [μg·min-1·g-1] | ||||||
|---|---|---|---|---|---|---|---|---|---|
| NAD+-SDH | SOX | SS-c | NI | AI | SS | SPS | S6PDH | ||
| 2018 | CK | 0.95c | 3.33a | 8.13c | 3.57d | 11.12b | 15.42b | 325.6d | 322.9c |
| Mg50 | 1.62b | 3.57a | 8.94b | 4.27c | 12.48a | 29.11a | 457.3c | 437.6b | |
| Mg100 | 1.67b | 3.58a | 9.02b | 4.31c | 12.44a | 29.85a | 475.2c | 451.3b | |
| Mg150 | 2.23a | 3.42a | 9.74a | 4.73b | 12.47a | 30.27a | 528.1b | 688.2a | |
| Mg200 | 2.26a | 3.57a | 9.85a | 4.76a | 12.54a | 31.32a | 586.7a | 698.7a | |
| 2019 | CK | 0.88c | 3.28a | 8.06c | 3.48c | 11.03c | 15.42c | 335.8c | 335.7d |
| Mg50 | 1.52b | 3.15a | 8.84b | 4.19b | 11.66b | 22.92b | 465.5b | 448.2c | |
| Mg100 | 1.57b | 3.32a | 8.75b | 4.25b | 12.27a | 29.66a | 468.3b | 574.5b | |
| Mg150 | 2.05a | 3.46a | 9.66a | 4.58a | 12.32a | 30.16a | 578.1a | 690.1a | |
| Mg200 | 2.12a | 3.63a | 9.78a | 4.69a | 12.34a | 31.24a | 593.4a | 688.3a | |
Significant differences were detected by different letters at P ≤ 0.05.