Table 1. Identification of compounds in the root volatile profile.

Identified compound	Rt (min)	KI	%
			Inoculated	Non-inoculated
decanal	20.351	1206	6.68	22.66
unknown hydrocarbon I	23.968	1336	10.54	11.38
unknown hydrocarbon II	24.240	1346	6.84	6.56
α-copaene	25.136	1380	4.69	4.92
1-tetradecene	25.450	1393	10.96	17.74
(E)-β-caryophyllene	26.289	1424	50.85	22.15
geranyl acetone	27.026	1454	9.44	14.60

Retention time (Rt), Kovats Index (KI), peak area (%) and identification of compounds emitted by inoculated and non-inoculated corn roots through combined GC-MS analysis.