Table 2.

Results of the two-way ANOVA to study main effects of herbivory (HB), ozone (O₃), and their interactive (O₃ × HB) effect on volatile emissions for each plant species. Significant main effect and interactions are embolden. ns = P > 0.1

Type	Species	HB	O3	O3 × HB
Total VOC
Wild	B. vulgaris	0.006	ns	ns
	B. nigra	< 0.001	ns	ns
	S. arvensis	ns	ns	ns
	R. raphanistrum	ns	ns	ns
Cultivated	B. juncea	ns	ns	ns
	B. napus	< 0.001	ns	ns
	S. alba	0.057	ns	ns
	R. sativus	ns	ns	ns
GLVs
Wild	B. vulgaris	0.005	ns	ns
	B. nigra	0.002	ns	ns
	S. arvensis	ns	ns	ns
	R. raphanistrum	ns	ns	ns
Cultivated	B. juncea	0.073	ns	ns
	B. napus	< 0.001	ns	ns
	S. alba	0.065	ns	ns
	R. sativus	ns	ns	ns
Monoterpenes
Wild	B. vulgaris	< 0.001	ns	ns
	B. nigra	ns	0.047	ns
	S. arvensis	ns	ns	ns
	R. raphanistrum	ns	ns	ns
Cultivated	B. juncea	ns	ns	ns
	B. napus	< 0.001	ns	ns
	S. alba	ns	ns	ns
	R. sativus	< 0.001	ns	ns
Sesquiterpenes
Wild	B. vulgaris	< 0.001	ns	0.027
	B. nigra	0.014	ns	ns
	S. arvensis	ns	ns	ns
	R. raphanistrum	ns	0.025	ns
Cultivated	B. juncea	ns	ns	ns
	B. napus	< 0.001	ns	ns
	S. alba	< 0.001	ns	ns
	R. sativus	ns	ns	ns
Nitrogen-, and sulphur-containing compounds
Wild	B. vulgaris	-	-	-
	B. nigra	< 0.001	ns	ns
	S. arvensis	-	-	-
	R. raphanistrum	ns	0.096	ns
Cultivated	B. juncea	ns	ns	ns
	B. napus	-	-	-
	S. alba	-	-	-
	R. sativus	ns	ns	ns