Table 1.

P-values for independent effects of infection with C. pubescens (I), size of U. europaeus, and their interaction (I×S) on total, shoot, and root biomass, shoot/root ratio (S/R), nodule biomass (Nod), Nod g^–1 host root biomass, pre-dawn and midday quantum yields (F_v/F_m, Φ _PSII), maximum electron transport rates (ETR_max), midday water potential (Ψ), carbon isotope composition (δ ¹³C), and foliar nitrogen (N) and iron (Fe) concentration of U. europaeus

	Total	Shoot	Root	S/R	Nod	Nod g–1 root	F v/Fm	ΦPSII	ETRmax	Ψ	δ13C	N	Fe
I	<0.0001	<0.0001	<0.0001	0.020	<0.0001	0.013	0.0004	0.026	0.003	0.779	0.0007	0.925	0.001
S	<0.0001	<0.0001	0.0005	0.193	0.011	0.105	0.172	0.041	0.113	0.043	0.002	0.228	0.039
I×S	0.053	0.066	0.068	0.559	0.029	0.662	0.832	0.394	0.415	0.235	0.184	0.742	0.0005

Significant and marginally significant effects are in bold; df, F, and sum of square values are presented in Supplementary Table S1. Total, shoot, root, and Nod biomass were square root transformed, and ETR_max, Nod g^–1 host root biomass, and Fe were log transformed to achieve homoscedasticity.