Table 3.
Effects of Glu and γ-PGA on photosynthetic pigment of Chinese cabbage under heat stress.
| Pigment | Treatments | ||
|---|---|---|---|
| Ctrl | Glu | PGA | |
| SPAD | 29.13 ± 0.54 b | 32.73 ± 0.46 a | 32.23 ± 0.19 a |
| chl a (mg·g−1 FW) | 1.54 ± 0.03 b | 2.13 ± 0.05 a | 1.88 ± 0.03 a |
| chl b (mg·g−1 FW) | 0.45 ± 0.01 c | 0.69 ± 0.03 a | 0.57 ± 0.07 b |
| total chl (mg·g−1 FW) | 1.99 ± 0.04 c | 2.83 ± 0.05 a | 2.45 ± 0.02 b |
| carotenoid (mg·g−1 FW) | 0.25 ± 0.05 b | 0.33 ± 0.06 a | 0.31 ± 0.04 a |
| chl a/b | 3.39 ± 0.04 b | 3.06 ± 0.08 a | 3.29 ± 0.10 b |
| chl/car | 8.07 ± 0.19 ab | 8.54 ± 0.30 a | 7.82 ± 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.