Supplementary information
Methods S1. Proteomics analyses.
Table S1. Summary of nutrient conditions.
Table S2. List of significant proteins.
Fig. S1. Overview of the experimental design.
Fig. S2. Summary of putrescine content in leaves and roots.
Fig. S3. Significant transporters and channels in leaves.
Fig. S4. Significant transporters and channels in roots.
Fig. S5. Proteins associated with a significant K x Ca and Kx putrescine interaction.
Fig. S6. Relative content in copper amine oxidase.
Fig. S7. S assimilation pathway, and methionine and cysteine content.