TABLE 4.
Diversity indices based on DGGE data, colony morphology, and Biolog data for the four treatments of experiment 1
| Analysis | Diversity indexa | Value
|
ANOVAb
|
|||||
|---|---|---|---|---|---|---|---|---|
| Roots
|
Nutrient solution
|
|||||||
| No protozoa | Mixed protozoa | No protozoa | Mixed protozoa | Subst. | Prot. | Int. | ||
| DGGE | No. of bands (S) | 46.7 | 45.3 | 43.7 | 40.3 | NS | NS | NS |
| Shannon (H) | 1.51 | 1.49 | 1.42 | 1.36 | *** | * | NS | |
| Evenness (E) | 0.91 | 0.90 | 0.87 | 0.85 | *** | NS | NS | |
| Simpson (1/D) | 25.8 | 21.4 | 18.0 | 15.1 | *** | ** | NS | |
| Berger-Parker (1/d) | 14.6 | 7.5 | 8.1 | 6.0 | * | * | NS | |
| CFU | Sequential-sampling index | 0.83 | 0.77 | 0.70 | 0.64 | *** | * | NS |
| Biolog | No. of positive wells | 69.7 | 68.3 | 68.0 | 55.3 | ** | *** | * |
a
For formulas for calculation of indices, see the text.
b
Significance levels (two-way analysis of variance) for effects of substrate (Subst.), presence of protozoa (Prot.), and interaction between these factors (Int.) (***, P < 0.001; **, P < 0.01; *, P < 0.05; NS, not significant).