Fig. S1 Percentage colonization of roots of Poa pratensis and Cynodon dactylon by arbuscules, vesicles and hyphae produced by arbuscular mycorrhizal fungi (AMF) isolates of different species or mixtures from cool and warm climatic origins under either cool or warm growth conditions.

Fig. S2 Number of spores and soil hyphal colonization produced by arbuscular mycorrhizal fungi (AMF) isolates from cool and relatively warmer origins under either cool or relatively warmer environmental conditions.

Table S1 Mean annual temperatures for the 30-yr period 1971–2000 in regions that correspond to the geographic origin of the arbuscular mycorrhizal fungi (AMF) isolates used in this study

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