Contrasting arbuscular mycorrhizal communities colonizing different host plants show a similar response to a soil phosphorus concentration gradient.

In Viola neither sampling time nor soil P concentration had a significant effect on the total number of T-RFs, although there was a definite trend towards lower numbers of T-RFs at P8 in Viola , with 9.8 compared with 20.3–23.5 in P1–P4, and the P value was somewhat marginal ( Table 3 ).

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