Fig. 6: Correlation analysis of metabolite, genotype and physiological data.

A PCA biplot of metabolic changes over time in the four Populus genotypes exposed to the stress treatments. PC1 separates the data across time and PC2 across treatment. Blue arrows correspond to the vectors of the component variables (metabolites). Vectors were extended with a thinner line for graphical purposes when necessary. B PCA biplot of physiological changes in Populus roots. PC1 separates the data across NaCl and mannitol treatments; PC2 separates data between treatments.