Table 2.
Pairwise cross-species and phylogenetically independent contrast (PIC) correlations between the traits in this study
| LDM | LWC | LDMC | SLA | MT | UECS | SD | SV | SAI | VD | PL | PW | PIL | FDM | FWC | FPVN | FN | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LDM | − 0.336 | 0.209 | − 0.176 | − 0.190 | − 0.187 | − 0.442 | 0.561 | − 0.610 | 0.229 | 0.459 | 0.261 | 0.480 | 0.703 | − 0.387 | 0.222 | 0.322 | |
| LWC | − 0.689 | - 0.986*** | 0.501 | 0.476 | − 0.286 | − 0.427 | 0.178 | − 0.032 | − 0.806* | − 0.062 | − 0.235 | − 0.007 | − 0.156 | 0.420 | − 0.287 | − 0.003 | |
| LDMC | 0.706* | − 0.987*** | − 0.445 | − 0.503 | 0.307 | 0.435 | − 0.240 | 0.054 | 0.742* | 0.063 | 0.108 | − 0.008 | 0.025 | − 0.347 | 0.250 | 0.029 | |
| SLA | − 0.594 | 0.743* | − 0.757* | − 0.505 | 0.435 | − 0.534 | 0.469 | 0.065 | − 0.547 | 0.704 | − 0.640 | 0.556 | 0.153 | 0.314 | − 0.434 | − 0.046 | |
| MT | − 0.277 | 0.400 | − 0.363 | − 0.298 | − 0.754* | 0.107 | − 0.408 | − 0.173 | − 0.292 | − 0.780* | 0.338 | − 0.628 | − 0.432 | 0.238 | 0.063 | 0.060 | |
| UECS | − 0.513 | 0.210 | − 0.272 | 0.668 | − 0.575 | 0.368 | 0.054 | 0.657 | 0.387 | 0.327 | − 0.033 | 0.094 | 0.288 | 0.035 | − 0.411 | − 0.673 | |
| SD | 0.595 | − 0.723* | 0.783* | − 0.776* | − 0.006 | − 0.323 | − 0.726* | 0.729* | 0.702 | − 0.693 | 0.575 | − 0.747* | − 0.225 | − 0.048 | − 0.013 | − 0.686 | |
| SV | 0.354 | 0.096 | − 0.145 | 0.395 | − 0.545 | 0.130 | − 0.403 | − 0.272 | − 0.256 | 0.742* | − 0.224 | 0.882** | 0.726* | − 0.448 | 0.226 | 0.391 | |
| SAI | 0.587 | − 0.503 | 0.575 | − 0.414 | − 0.262 | − 0.100 | 0.857** | − 0.042 | 0.424 | − 0.323 | 0.329 | − 0.325 | 0.042 | − 0.151 | − 0.033 | − 0.739* | |
| VD | 0.008 | − 0.542 | 0.428 | − 0.252 | − 0.391 | 0.444 | 0.244 | − 0.122 | 0.104 | − 0.189 | 0.696 | − 0.204 | 0.375 | − 0.529 | 0.329 | − 0.406 | |
| PL | 0.092 | 0.103 | − 0.155 | 0.647 | − 0.773* | 0.461 | − 0.550 | 0.823* | − 0.221 | 0.007 | − 0.525 | 0.906** | 0.518 | − 0.135 | − 0.059 | 0.324 | |
| PW | 0.849** | − 0.670 | 0.680 | − 0.736* | − 0.063 | − 0.435 | 0.825** | 0.037 | 0.772* | 0.244 | − 0.280 | − 0.439 | 0.413 | − 0.395 | 0.281 | − 0.478 | |
| PIL | 0.608 | − 0.240 | 0.232 | 0.167 | − 0.693 | − 0.028 | − 0.083 | 0.879** | 0.235 | − 0.097 | 0.777* | 0.253 | 0.582 | − 0.446 | 0.311 | 0.546 | |
| FDM | 0.526 | − 0.227 | 0.143 | 0.128 | − 0.640 | 0.229 | − 0.042 | 0.823** | 0.239 | 0.333 | 0.666 | 0.418 | 0.773* | − 0.611 | 0.267 | − 0.097 | |
| FWC | − 0.570 | 0.547 | − 0.485 | 0.295 | 0.506 | 0.070 | − 0.234 | − 0.570 | − 0.362 | − 0.480 | − 0.331 | − 0.534 | − 0.675 | −0.749* | − 0.883** | − 0.282 | |
| FPVN | 0.765* | − 0.656 | 0.671 | − 0.626 | − 0.196 | − 0.546 | 0.547 | 0.273 | 0.555 | 0.160 | − 0.031 | 0.728* | 0.553 | 0.408 | −0.821** | 0.534 | |
| FN | 0.535 | − 0.323 | 0.368 | − 0.389 | 0.038 | − 0.756* | 0.053 | 0.283 | − 0.032 | − 0.383 | 0.097 | 0.186 | 0.499 | 0.017 | −0.355 | 0.653 |
Correlation data are given for species-based analyses below the diagonal and for PIC analyses above the diagonal. The degree of significance for each correlation is indicated as follows
LDM leaf dry mass, LWC leaf water content; LDMC, leaf dry matter content, SLA specific leaf area, MT mesophyll thickness, UECS upper epidermal cell size, SD stomatal density, SV stomatal volume, SAI stomatal area index, VD vein density, PL pseudobulb length, PW pseudobulb width, PIL pseudobulb internode length, FDM flower dry mass, FWC flower water content, FPVN flower petal vein number, FN flower number per pseudobulb
*p < 0.05
**p < 0.01
***p < 0.001