Table 1.

The model heterogeneity (Q_M) for changes in plant traits under drought treatment alone, and under drought and herbivory treatments combined.

Treatment per plant part	Plant trait measured	QM	df	P
Drought
Leaf	Primary metabolites	2400	240	<0.001
	Secondary metabolites	966	222	<0.001
	N-Based compounds	55.2	20	<0.001
	C-Based compounds	911	201	<0.001
	Physical traits	10.6	7	0.2
	Hormone	107	14	<0.001
	Biomass	329	33	<0.001
	Nutrients	263	35	<0.001
Root	Primary metabolites	158	17	<0.001
	Secondary metabolites	143	13	<0.001
	Physical traits	22.1	9	<0.01
	Hormone	7.18	3	0.07
	Biomass	154	20	<0.001
	Nutrients	86.6	9	<0.001
Drought x Herbivory
Leaf	Primary metabolites	1.84	2	0.4
	Secondary metabolites	242	93	<0.001
	Hormone	30.6	14	<0.01

A significant Q_M (P < 0.05) indicates that the treatment explains a significant proportion of the variance among observations.