Time-series elemental imaging reveals CAX-dependent redistribution patterns for anoxia recovery.

In Arabidopsis thaliana (Col-0), post-anoxia elemental distribution resembles CAX mutant patterns under normoxia, linking CAX-dependent pre-anoxia distribution to faster recovery.

• Why it matters: Oxygen deprivation from flooding threatens plant survival, but how CAX transport shapes spatial nutrient/metal patterns during recovery remains unclear.
• What they did: Time-series elemental imaging combined X-ray fluorescence microscopy and laser ablation–inductively coupled plasma mass spectrometry to track redistribution during anoxia recovery in cax1 and the cax1-4 quadruple mutant.
• The result: CAX mutants showed reduced lipid peroxidation and increased flood-tolerance protein expression during recovery, and CAX mutants’ altered manganese and copper tolerance did not change leaf metal distribution during metal stress.

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