TABLE 1.
Geographical origin of stone samples used in this study, detection of Geodermatophilaceae using primers Geosp2 and Geosp1, and concentration of total DNA
| Sample | Geographical origin | Stone type | Total DNAb | RT-PCR amplificationa (Geosp2/Geosp1) |
|---|---|---|---|---|
| 1A | La Cabrera (Madrid) | Granite (stone) | 5.69 | 1 |
| 1B | La Cabrera (Madrid) | Granite (lichen) | 15.17 | 1 |
| 2A | La Cabrera (Madrid) | Granite (stone) | 29.58 | 1 |
| 2B | La Cabrera (Madrid) | Granite (lichen) | 59.28 | 1 |
| 3 | Cala S. Vicente (Mallorca) | Limestone | 9.40 | 0 |
| 4 | Cala S. Vicente (Mallorca) | Limestone | 69.99 | 1 |
| 5A | El Atazar (Madrid) | Slate (stone) | 41.99 | 1 |
| 5B | El Atazar (Madrid) | Slate (lichen) | 89.21 | 1 |
a
Amplification results: 1, positive amplification; 0, absence of amplification products.
b
Values are expressed as ng of DNA/mg of stone.