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Plant-specific TCP transcription factors play vital roles in the controlling of growth, development, and the stress response processes. Extensive researches have been carried out in numerous species, however, there hasn’t been any information available about  TCP  genes in sweet potato ( Ipomoea batatas  L.). In this study, a genome-wide analysis of  TCP  genes was carried out to explore the evolution and function in sweet potato. Altogether, 18  IbTCPs  were identified and cloned. The expression profiles of the  IbTCPs  differed dramatically in different organs or different stages of leaf development. Furthermore, four CIN-clade  IbTCP  genes contained miR319-binding sites. Blocking  IbmiR319  significantly increased the expression level of  IbTCP11/17  and resulted in a decreased photosynthetic rate due to the change in leaf submicroscopic structure, indicating the significance of IbmiR319-targeted  IbTCPs  in leaf anatomical morphology. A systematic analyzation on the characterization of the  IbTCPs  together with the primary functions in leaf anatomical morphology were conducted to afford a basis for further study of the  IbmiR319 / IbTCP  module in association with leaf anatomical morphology in sweet potato.

frontiers in plant science

Genome-Wide Identification of TCP Transcription Factors Family in Sweet Potato Reveals Significant Roles of miR319-Targeted TCPs in Leaf Anatomical Morphology