Fig. 2From: Polyploidy and the relationship between leaf structure and function: implications for correlated evolution of anatomy, morphology, and physiology in Brassica Phenotypic correlations among individual plants from the parent (2n) species. B. rapa (blue), B. oleracea (red), and B. nigra (black). Histograms show trait distributions and correlations. Non-significant correlations are in gray. Palisade_spongy, the ratio of palisade parenchyma to spongy mesophyll; p < 0.05, *; p < 0.01, **; p < 0.001, ***, p < 0.0001 ****Back to article page