Figure 8

Heatmap of Pearson correlation coefficients between variables measured in cotton (Gossypium hirsutum) plants grown in nutrient solution containing different concentrations of phosphorus (P) and zinc (Zn) for 13 weeks. *Indicates significant correlation (at P ≤ 0.05). Traits associated with P and Zn concentration and content are highlighted in green, parameters related to growth and biomass are highlighted in grey, gas exchange and photochemistry parameters are highlighted in purple and enzyme activities are highlighted in red. Figures were produced using R (v3.4.3, https://www.R-project.org).