Table 1.
Correlation analysis of the chlorophyll a fluorescence parameter F v /F m among different sampling times in grape leaves under a heat stress of 47°C for 40 min
| F v /F m (05/2012) | F v /F m (06/2012) | F v /F m (07/2012) | F v /F m (06/2013) | F v /F m (07/2013) | |
|---|---|---|---|---|---|
| Fv/Fm (05/2012) |
1 |
0.834** |
0.623** |
0.542** |
0.602** |
| Fv/Fm (06/2012) |
|
1 |
0.695** |
0.683** |
0.580** |
| Fv/Fm (07/2012) |
|
|
1 |
0.640** |
0.411** |
| Fv/Fm (06/2013) |
|
|
|
1 |
0.480** |
| Fv/Fm (07/2013) | 1 |
The asterisks * and ** indicate a significant correlation at P < 0.05 and P < 0.01, respectively.