Table 1.
Percentage average of total peak area (±SE) of volatile compounds in the overhead space of sealed Petri dishes, as determined by SPME–GC analysis, produced by pure cultures of Pseudomonas tolaasii, Pleurotus eryngii, and P. ostreatus strains and by non-inoculated KBA and MEA media.
| Volatile compoundsa |
P. tolaasii strainsb |
P. eryngii DS256b | P. ostreatus DS284b | Media |
|||
|---|---|---|---|---|---|---|---|
| NCPPB 2192 | USB1 | USB66 | KBc | MEAd | |||
| Carbon dioxide (CO2) | 63.66 ± 2.20 | 44.71 ± 5.22 | 42.73 ± 4.34 | 69.86 ± 1.26 | 6.75 ± 0.88 | 5.04 ± 0.22 | 5.31 ± 0.59 |
| Nitrous oxide (NO2) | – | – | – | 1.10 ± 0.11 | – | – | – |
| Ethylene oxide | – | – | – | – | 5.41 ± 0.32 | – | 45.25 ± 1.94 |
| Acetaldehyde | – | – | – | – | 69.42 ± 2.44 | 52.55 ± 1.98 | – |
| Propane | – | – | – | – | – | 2.68 ± 0.32 | – |
| Methanethiol (MT) | 2.12 ± 0.19 | 1.89 ± 0.19 | 2.03 ± 0.27 | – | – | – | – |
| Dimethyl disulfide (DMDS) | 0.25 ± 0.04 | 0.22 ± 0.04 | 0.26 ± 0.04 | – | – | – | – |
| p-cymene | Traces | 0.11 ± 0.04 | 0.10 ± 0.03 | – | – | – | – |
| 1,4-undecadiene | – | 0.49 ± 0.18 | 0.20 ± 0.04 | – | – | – | – |
| 1-undecene | 11.86 ± 2.34 | 17.04 ± 2.73 | 14.45 ± 2.08 | – | – | – | – |
| 2-undecanone | 1.98 ± 0.71 | – | 0.40 ± 0.04 | – | – | – | – |
| 4,7-dimethylundecane | Traces | 0.13 ± 0.04 | 0.15 ± 0.03 | – | – | – | – |
aVolatile compounds are reported according to their molecular weight. bPseudomonas tolaasii, Pleurotus eryngii, and P. ostreatus strains were grown on KB and MEA, respectively; NCPPB, National Collection of Plant Pathogenic Bacteria; USB, Microorganism collection of Università (U) degli Studi (S) della Basilicata (B). cKB, medium B of King et al. (1954). dMEA, Malt Extract Agar. –, no volatile compounds detected.