Table 2. Volatile compounds identified in the headspace P. donghuensis P482 wt not present in the KN3318 gacA mutant culture.

RT	Compound name	ERI	Formula
2.41	dimethyl sulfide	540	C2H6S
4.18	S-methyl thioacetate	701	C3H6OS
4.39	methyl thiocyanate	709	C2H3NS
13.19	dimethyl trisulfide	966	C2H3S3
18.65	1-undecan	1091	C11H22
N/A*	hydrogen cyanide	N/A	HCN

RT- retention time in min and ERI- experimental retention index;

* Hydrogen cyanide could not be detected/measured using GC-QTOF and was measured as described by Castric and Castric [36]