Table 3. Product moment correlations (r) from the normalized Mantel Z statistics for comparisons of chlorophyll variable fluorescence and glutathione reductase (GR) activity measurements used to estimate the relative aggressiveness of three grasses based on their ability to produce seedling dry mass.
|
Product moment correlation
|
Measurement
|
FRR
|
Avg.
FRR
|
Temp. of
peak FRR
|
km
|
 GR
|
GRAvg
|
Seedling
dry mass
|
Interference
dry mass
|
|
_ r _
|
| FRR |
1.00 |
|
|
|
|
|
|
|
| Avg. FRR |
0.42 |
1.00 |
|
|
|
|
|
|
| Temp. of peak FRR |
-1.000.01 |
-0.33 |
1.00 |
|
|
|
|
|
| km |
-0.51 |
0.56 |
0.59 |
1.00 |
|
|
|
|
| GR |
-0.67 |
0.960.1 |
-0.60 |
-0.29 |
1.00 |
|
|
|
| GRAvg |
0.21 |
0.970.1 |
-0.11 |
0.74 |
-0.86 |
1.00 |
|
|
| Seedling dry mass |
0.67 |
0.960.1 |
-0.59 |
0.30 |
-1.000.01 |
0.86 |
1.00 |
|
Interference dry mass
|
0.79
|
0.89
|
-0.73
|
0.12
|
-0.980.1
|
0.76
|
0.980.1
|
1.00
|
|
FRR, fluorescence reappearance ratios for eight temperatures at 12 times after illumination; km, apparent Michaelis–Menten constant of glutathione for glutathione reductase (GR) measured at eight temperatures; GR, total change in apparent km over the range of measured temperatures; and GRavg, average change in apparent km; Seedling dry mass is the weight of individual seedlings grown in monoculture at 5, 10, 20, and 30°C; and interference dry mass is the average seedling dry mass due to interference measured at four temperatures in three mixture ratios.
Superscripts indicate the P for r based on critical values for the one-tailed t using Eq. [5] for 1 df from Rohlf and Sokal (1981). Because of the limited number of degrees of freedom, relationships with P 
0.10 were accepted as significant.
