Fig. 4 Root DM of tall fescue genotypes DN2 and DN4 grown in a P-deficient soil supplied with phosphate rock (PR) and in vitro P solubility (from PR) by tall fescue root exudates in response to infection with the leaf fungal endophyte, N. coenophialum (E-, noninfected; E+, infected). Adapted from Malinowski and Belesky (1999a)