Table 2.
The relationships denoted by the Pearson correlation coefficient and p value between environmental factors (photosynthetically active radiation (PAR), temperature (T), and relative humidity (RH)) and circadian rhythms in structural traits at the plant level under standard and cold stress conditions. PLL and PLA represent projected leaf length and projected leaf area, respectively.
| Traits | Standard conditions | Cold stress | ||||
|---|---|---|---|---|---|---|
| PAR | RH | T | PAR | RH | T | |
| H max | -0.08 | 0.53 | -0.56 | -0.87 | 0.42 | -0.62 |
| H mean | -0.39 | -0.08 | -0.09 | 0.27 | 0.04 | -0.1 |
| H 99 | 0.06 | 0.2 | -0.38 | 0.68 | 0.56 | -0.75 |
| Crown size | 0.67 | 0.45 | -0.3 | 0.67 | 0.59 | -0.66 |
| Azimuth | -0.13 | -0.23 | 0.07 | 0.14 | 0.66 | -0.94 |
| PLA | -0.47 | -0.84 | 0.91 | 0.41 | 0.69 | -0.93 |
| Volume | -0.39 | -0.44 | 0.48 | 0.48 | 0.55 | -0.74 |
| PAI | -0.03 | 0.09 | -0.09 | 0.48 | 0.11 | -0.26 |
| 3DPI | 0 | 0.36 | -0.49 | -0.31 | -0.33 | 0.4 |
Normal represents p > 0.05; bold represents p < 0.05; underline represents p < 0.01; bold-underline represents p < 0.001.