Table 1.
Heterogeneity statistics for the 22 summary effect sizes under NaCl stress: Qt, total heterogeneity; phetero, probability that the observed heterogeneity was due entirely to sampling error and not to variation among true effects; I2, percentage of heterogeneity due to true variation among effect sizes.
| Summary effect | Qt | phetero | I2 | AM-induced change (%) |
|---|---|---|---|---|
| Shoot K+/Na+ ratio | 313 | 0.003 | 21 | 58 |
| Root K+ | 93 | 0.399 | 3 | 47 |
| Root K+/Na+ ratio | 121 | 0.031 | 22 | 47 |
| Shoot K+ | 158 | 1.000 | 0 | 42 |
| Shoot total soluble CHO | 63 | 0.988 | 0 | 28 |
| Root total soluble CHO | 2 | 1.000 | 0 | 19 |
| Root Ca++ | 12 | 1.000 | 0 | 16 |
| Shoot Ca++ | 41 | 1.000 | 0 | 13 |
| Shoot Mg++ | 25 | 1.000 | 0 | 12 |
| Shoot glycine betaine | 4 | 1.000 | 0 | 9 |
| Root Mg++ | 2 | 1.000 | 0 | 6 |
| Root proline | 151 | 0.037 | 19 | 6 |
| Root Na+ | 69 | 1.000 | 0 | 5 |
| Root glycine betaine | 2 | 0.996 | 9 | 1 |
| Root Cl− | 8 | 1.000 | 0 | 1 |
| Leaf Ψπ | 2 | 1.000 | 0 | −1 |
| Shoot proline | 182 | 0.904 | 0 | −1 |
| Shoot total polyamines | <1 | 1.000 | 0 | −2 |
| Shoot Cl− | 30 | 1.000 | 0 | −3 |
| Leaf Ψ | 3 | 1.000 | 0 | −18 |
| Shoot Na+ | 135 | 1.000 | 0 | −19 |
| Shoot total amino acids | 49 | <0.001 | 77 | −23 |
Summary effect sizes showing significant heterogeneity among true effects (p ≤ 0.1) are shown in bold. Summary effects are ordered from high to low, as in Figure 1A. For AM-induced changes in summary effects, computed from ln R as raw percentages, positive values indicate AM-induced increases and negative values AM-induced decreases. Sample sizes and p-values for summary effect sizes differing from zero are given in Figure 1A.