The lab has deposited in BioRxiv.org three preprints in which we characterized MtCOPT1, MtZIP6, and MtMOT1.3, three transporters respectively involved in copper, zinc, and molybdate uptake by rhizobia-infected cells. These works complement a previous study on MtNramp1, a transporter involved in iron uptake by these cells (Tejada-Jiménez et al. 2015).