Golgi-localized MCW1 Mediates Manganese Homeostasis, Which Is Essential for Arabidopsis Growth

Plants require the micronutrient element manganese (Mn) for normal growth and development. Mn2+/H+ antiporters and Mn2+ transporters have been described and studied in the plasma membrane and organelle membranes of plant cells. However, the transport of manganese into the lumen of the Golgi remains poorly understood. Here we report the identification and characterization of a Golgi-localized potentialMn2+/H+ antiporter, MCW1, in Arabidopsis thaliana.