There was a marginally significant effect of region on seed number; southern plants produced more seeds than northern plants in both rhizobia treatments (Figure 3 , Table 1 ).
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No evidence for adaptation to local rhizobial mutualists in the legume <i>Medicago lupulina</i>.
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The sentences
We found a highly significant rhizobia‐by‐region interaction for nodule number (Table 1 ).