Fig. 1.

Lateral root-branching density of crown, primary, and seminal roots under high-N (HN) and low-N (LN) conditions at 42 days after planting in GH mesocosms (A), at 14 and 13 weeks after planting in the field in RS (B) and SA (C). The data shown in GH mesocosms are means of four replicates of the nine genotypes, and in RS and SA are means of four replicates of the five genotypes in each phenotypic class in either HN or LN ± SE. Different letters represent significant differences (P < 0.05) compared within each root class.