Table 2 Analysis of various growth parameters of potato plant leaves and tubers in response to low temperature. -- means no data. The values represent the means ± SDs; n = 3. The means with different letters are significantly different from each other (P < 0.05)
Processing period | Variety | Temperature (°C) | Plant height (cm) | Stem diameter (mm) | Leaf area (cm2) | Tuber number per plant | Tuber fresh weight per plant (g) | Root-to-shoot ratio |
|---|---|---|---|---|---|---|---|---|
24 day | Jianchuanhong | CK | 34.25 ± 3.14 c | 2.19 ± 0.26 d | 0.88 ± 0.37 f | -- | -- | -- |
15 °C | 18.23 ± 2.05 e | 4.18 ± 0.35 c | 11.47 ± 6.47 de | -- | -- | -- | ||
10 °C | 7.02 ± 0.41 f | 1.40 ± 0.38 d | 13.76 ± 3.45 cde | -- | -- | -- | ||
Huaxinyangyu | CK - | 16.29 ± 1.37 e | 2.71 ± 0.54 bc | 3.41 ± 1.98 g | -- | -- | -- | |
15 °C | 11.70 ± 2.05 f | 2.88 ± 0.50 bc | 20.95 ± 3.95 cd | -- | -- | -- | ||
10 °C | 4.84 ± 0.92 i | 1.45 ± 0.33 d | 14.87 ± 6.78 ef | -- | -- | -- | ||
48 day | Jianchuanhong | CK | 70.83 ± 1.56 b | 4.01 ± 0.81 c | 3.40 ± 0.86 f | 2.33 ± 0.58 d | 4.00 ± 0.43 d | 1.36 ± 0.21 a |
15 °C | 26.25 ± 1.66 d | 4.44 ± 0.56 c | 20.46 ± 0.79 bc | 4.67 ± 1.15 d | 7.63 ± 0.87 c | 6.18 ± 1.59 b | ||
10 °C | 8.65 ± 0.37 f | 1.73 ± 0.36 d | 14.99 ± 3.12 cd | -- | -- | -- | ||
Huaxinyangyu | CK | 26.27 ± 2.52 b | 3.61 ± 0.61 bc | 8.72 ± 2.27 fg | 3.67 ± 1.15 c | 3.03 ± 0.94 c | 0.56 ± 0.13 c | |
15 °C | 20.17 ± 1.04 d | 4.07 ± 0.80 b | 39.74 ± 4.18 b | 7.00 ± 1.73 bc | 6.58 ± 1.08 c | 1.68 ± 0.08 a | ||
10 °C | 6.99 ± 0.42 h | 1.51 ± 0.14 d | 20.96 ± 4.46 cd | -- | -- | -- | ||
72 day | Jianchuanhong | CK | 87.57 ± 6.46 a | 5.48 ± 0.70 b | 7.18 ± 0.96 ef | 5.33 ± 0.58 d | 7.28 ± 1.48 c | 1.48 ± 0.05 a |
15 °C | 29.43 ± 4.55 d | 6.12 ± 0.79 a | 34.76 ± 5.87 a | 11.67 ± 2.52 c | 15.72 ± 1.70 a | 2.91 ± 0.55 a | ||
10 °C | 9.24 ± 0.62 f | 2.01 ± 0.27 d | 25.82 ± 8.94 b | -- | -- | -- | ||
Huaxinyangyu | CK | 33.05 ± 1.75 a | 3.91 ± 0.22 b | 16.84 ± 3.66 d | 4.67 ± 1.53 c | 5.64 ± 1.52 c | 1.20 ± 0.02 b | |
15 °C | 22.73 ± 2.64 c | 5.37 ± 1.30 a | 56.34 ± 9.38 a | 9.67 ± 2.08 b | 13.40 ± 2.08 b | 1.82 ± 0.14 a | ||
10 °C | 9.52 ± 1.31 g | 2.04 ± 0.49 cd | 26.24 ± 8.66 c | -- | -- | -- | ||
96 day | Jianchuanhong | CK | -- | -- | -- | 15.33 ± 1.53 b | 11.77 ± 2.00 b | 1.52 ± 0.10 a |
15 °C | -- | -- | -- | 19.67 ± 1.53 a | 17.65 ± 0.47 a | 15.12 ± 1.10 a | ||
10 °C | -- | -- | -- | -- | -- | -- | ||
Huaxinyangyu | CK | -- | -- | -- | 6.33 ± 1.15 bc | 6.46 ± 1.21 c | 0.33 ± 0.03 c | |
15 °C | -- | -- | -- | 13.33 ± 1.53 a | 20.39 ± 6.66 a | 2.09 ± 016 a | ||
10 °C | -- | -- | -- | -- | -- | -- |