| Table 3. Pearson-r correlation coefficients between xylem sap characteristics: volume, conductivity and sugar content in four sample positions (E, S, W, N) around stem circumference; * p < 0.050, **p < 0.001. | ||||||||||||||||
| XYLEM SAP VOLUME | XYLEM SAP CONDUCTIVITY | XYLEM SAP SUGARS | ||||||||||||||
| E | S | W | N | Mean | E | S | W | N | Mean | E | S | W | N | Mean | ||
| XYLEM SAP VOLUME | E | |||||||||||||||
| S | 0.29* | |||||||||||||||
| W | 0.74** | 0.49** | ||||||||||||||
| N | 0.65** | 0.64** | 0.58** | |||||||||||||
| Mean | 0.82** | 0.72** | 0.83** | 0.90** | ||||||||||||
| XYLEM SAP CONDUCTIVITY |
E | –0.55** | –0.53** | –0.53** | –0.68** | –0.70** | ||||||||||
| S | –0.49** | –0.39* | –0.24 | –0.55** | –0.53** | 0.59** | ||||||||||
| W | –0.34* | –0.27* | –0.20 | –0.34* | –0.36* | 0.72** | 0.58** | |||||||||
| N | –0.41* | –0.34* | –0.26* | –0.36* | –0.42** | 0.74** | 0.55** | 0.79** | ||||||||
| Mean | –0.52** | –0.44** | –0.37* | –0.56** | –0.58** | 0.89** | 0.76** | 0.89** | 0.91** | |||||||
| XYLEM SAP SUGARS | E | 0.67** | 0.32* | 0.42** | 0.70** | 0.67** | –0.58** | –0.49** | –0.32* | –0.35* | –0.50** | |||||
| S | 0.65** | 0.14 | 0.30* | 0.67** | 0.57** | –0.53** | –0.46** | –0.32* | –0.38* | –0.49** | 0.94** | |||||
| W | 0.41* | 0.06 | 0.25* | 0.52** | 0.41* | –0.23 | –0.18 | 0.08 | 0.07 | –0.07 | 0.73** | 0.71** | ||||
| N | 0.60** | 0.18 | 0.25 | 0.66** | 0.56** | –0.58** | –0.55** | –0.40* | –0.49** | –0.58** | 0.85** | 0.89** | 0.53** | |||
| Mean | 0.65** | 0.20 | 0.33* | 0.70** | 0.61** | –0.54** | –0.48** | –0.29* | –0.34* | –0.48** | 0.97** | 0.98** | 0.78** | 0.92* | ||