Table 6.
Phylogenetic affiliations and clone number of bacterial 16S rRNA genes retrieved from ‘heavy’ (BD 1.587g ml−1) and ‘light’ (BD 1.563g ml−1) DNA fractions of maize hyphosphere soil in labeling experiment 2
| Phylogenetic group | Heavy | Light | T-RF (bp) |
|---|---|---|---|
| Alphaproteobacteria | |||
| Bradyrhizobiaceae | 4 | 150, 441 | |
| Methylobacteriaceae | 1 | 150 | |
| Uncultured | 10 | 3 | 150, 437 |
| Betaproteobacteria | 150 | ||
| Oxalobacteraceae | 2 | 109, 488 | |
| Uncultured | 7 | 4 | 452, 488, 492 |
| Gammaproteobacteria | |||
| Pseudomonadaceae | 1 | 490a | |
| Uncultured | 3 | 2 | 82, 141, 186 |
| Actinobacteria | |||
| Streptomycetaceae | 5 | 1 | 159 |
| Nocardioidaceae | 1 | 1 | 142, 161 |
| Micrococcaceae | 1 | 67 | |
| Uncultured | 3 | 1 | 161 |
| Firmicutes | 3 | 2 | 145, 153 |
| Cyanobacteria | 9 | 504 | |
| Uncultured | 21 | 20 | 82, 95, 113, 141, 153, 183, 287, 603 |
T-RFs with a relative abundance of >5% in total (105 clones) are indicated in bold.
a T-RF represents phosphate-solubilizing bacterium Pseudomonas alcaligenes added to the hyphal compartment in this study.