Phylogenetic relationships of Manihot esculenta metal transporters and storage proteins. Bootstrap values from 1,000 replicates are indicated at each node. (A) FRO family; Species designations are as follows: At, A. thaliana (AtFRO2); Ps, P. sativum (PsFRO1); Me, M. esculenta (MeFRO2). (B) IRT family; Species designations are as follows: At, A. thaliana (AtIRT1); Os, O. sativa (OsIRT1); Me, M. esculenta (MeIRT1, MeIRT2, and MeIRT6). (C) NRAMP family; Species designations are as follows: At, A. thaliana (AtNRAMP1); Os, O. sativa (OsNRAMP1); Le, Lycopersicum esculentum (LeNRAMP1); Me, M. esculenta (MeNRAMP2, MeNRAMP3). (D) YSL family; Species designations are as follows: At, A. thaliana (AtYSL1); Zm, Zea Mays (ZmYS1); Me, M. esculenta (MeYS1, MeYSL2). (E) Ferritin family. Species designations are as follows: At, A. thaliana (AtFER1); Zm, Zea Mays (ZmFER1); Me, M. esculenta (MeFER1, MeFER3, and MeFER8).