FIG 2.

(A) Principal-component analysis (PCA) of the AMF community composition in the roots and in the rhizosphere soil of Brachypodium retusum in six different soil types. The amounts of variation explained by the first two PCA axes were as follows: PCA1, 0.20; PCA2, 0.13. The model explained 54.3% of the whole variance. THS, Typic Haplosalid; XER, Lithic Xerorthent; TOR, Xeric Torriorthent; THA, Typic Haplargid; LHP, Lithic Haploxeroll; THP, Typic Haploxeroll; S, rhizosphere soil; R, roots. (B) PCA of the global AMF community composition under Brachypodium retusum in six different soil types. The amounts of variation explained by the first two PCA axes were as follows: PCA1, 0.19; PCA2, 0.18. The model explained 69.7% of the whole variance.