Arabidopsis thaliana nicotianamine synthase 4 is required for proper response to iron deficiency and to cadmium exposure.
Koen E, Besson-Bard A, Duc C, Astier J, Gravot A, Richaud P, Lamotte O, Boucherez J, Gaymard F, Wendehenne D. Plant Sci. 2013 Aug; 209:1-11. Epub 2013 Apr 26.