Phenotypic comparison of progeny plants from two maize B73 inbred lines grown for generations either exclusively in the field (set A) or in the greenhouse (set B).

<p>Plants were grown in compartmented pots with (+AM) or without (−AM) arbuscular mycorrhiza with phosphate addition to the hyphal compartment. (<b>A</b>) Comparison of plant growth phenotype. Pictures have been taken before harvest, approx. 7 weeks after sowing. (<b>B</b>) Comparison of dry weight (DW) and number of green leaves from 3–4 pooled plants of both inbred lines (set A and set B) analyzed in autumn 2010. Significant differences between the treatments are indicated by different letters (n = 3–4, <i>p</i>≤0.05, one-way ANOVA).