Figure 2

Relationship between nitrogen availability (mM) and mean plant traits at 4 weeks of age from experiment 2 (1 standard deviation is shown). The lines are fitted lines from the GLMs (Table 2). In all panels, nitrate (Filled triangles, dashed line), glutamine (open circles, solid line) and asparagine (filled circles, dotted line). (A) Flower number, (B) rosette diameter, (C) number of leaves, and (D) stress index. Note that count data was fit with a Poisson error distribution and a log link function, which can produce the appearance of non-linear fits in the untransformed scale.