Genome-Wide Identification and Analysis of the MAPK and MAPKK Gene Families in Potato (Solanum tuberosum L.)

Mitogen-activated protein kinase (MAPK) is an important component of the signal transduction pathway, which plays roles in regulating plant growth and development, abiotic stress. Potato (Solanum tuberosum L.) one most popular tuber crops world. Genome-wide identification analysis MAPK MAPKK gene family potato not clear. A total 20 genes 8 were identified genome. conservative motif showed that contained a typical TxY phosphorylation site, characteristic S/T-x5-S/T. Phylogenetic (mitogen-activated kinase) similar to Arabidopsis, including four groups members A, B, C D. Gene structure promoter sequence all 28 Solanum (StMAPK) StMAPKK have coding regions (CDS), same group intron exon compositions, cis-acting elements upstream promoters related stress response. Chromosome location found MAPKs unevenly distributed on 11 chromosomes, while MAPKKs only chromosomes Chr. 03 12. Collinearity StMAPKK3 StMAPKK6 common ancestors among potato, pepper, tomato. qRT-PCR results relative expressions StMAPK14 StMAPKK2 significantly upregulated under low-temperature These could provide new insights into characteristics evolution StMAPK facilitate further exploration molecular mechanism responsible for responses.