Metal Tolerance Protein Encoding Gene Family in : Genome-Wide Identification, Characterization and Expression under Multiple Metal Stresses.

Metal tolerance proteins (MTP) as divalent cation transporters are essential for plant metal tolerance and homeostasis. However, the characterization and the definitive phylogeny of the MTP gene family in , and their roles in response to metal stress are still unknown. In the present study, MTP genes in were identified, and their phylogenetic relationships, structural characteristics, physicochemical parameters, as well as expression profiles under five metal stresses including Fe, Mn, Cu, Zn, and Cd were also investigated. Phylogenetic relationship analysis showed that 12 MTP genes were classified into three major clusters and seven groups. All s had typical structural features of the MTP gene family and were predicted to be located in the cell vacuole. The upstream region of s contained abundant cis-acting elements, implying their functions in development progress and stress response. Tissue-specific expression analysis results indicated the regulation of s in the growth and development of . Besides, the expression of most genes could be induced by multiple metals and showed different expression patterns under at least two metal stresses. These findings provide useful information for the research of the metal tolerance mechanism and genetic improvement of .