Table 1.
HS-SPME/gas chromatography-mass spectrometry (GC-MS) profile of volatile organic compounds (VOCs) produced by Bacillus subtilis SYST2.
| RT (min:s) | Total area (%) | Possible compounds | CAS No. | Mol. weight | Effect on plant growth | |
|---|---|---|---|---|---|---|
| 100 ng/100 μl in 1 ml DMSO | 200 ng/200 μl in 1 ml DMSO | |||||
| 2.46 | 4.293 | Albuterol | 18559-94-9 | 239 | +Ve effect | +Ve effect |
| 3.010 | 1.661 | Methylphosphonic acid | 993-13-5 | 96 | NIL | NIL |
| 3.131 | 2.896 | 3-Methyl-3-buten-1-ol | 763-32-6 | 86 | NIL | NIL |
| 3.197 | 4.258 | 1,3-Propanediol, 2-methyl-,dipropanoate | 54932-83-1 | 202 | +Ve effect | +Ve effect |
| 3.289 | 2.119 | Silanediol, dimethyl | 1066-42-8 | 92 | NIL | NIL |
| 6.392 | 3.03 | 1,2-Benzenediol,3,5-bis(1,1-dimethylethyl) | 1020-31-1 | 222 | NIL | NIL |
| 9.387 | 3.249 | Cyclotetrasiloxane, octamethyl- | 556-67-2 | 296 | NIL | -Ve effect |
| 11.390 | 1.439 | 1-Octanol,2-butyl | 3913-02-8 | 186 | NIL | NIL |
| 11.922 | 2.120 | Benzoic acid | 122 | NIL | -Ve effect | |
| 14.399 | 1.61 | Cyclohexasiloxane, dodecamethyl- | 540-97-6 | 444 | NIL | NIL |
| 15.088 | 1.475 | Phenol,2-(1,1-dimethylethyl)-4-methyl | 2409-55-4 | 164 | NIL | NIL |
Similar compounds present both in inoculated and non-inoculated MS medium were excluded. Several minor air-peaks (≤1% of the total area) were also not included. RT, retention time.