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The TCP (Teosinte branched1/Cycloidea/Proliferating cell factors), a family of plant-speci c transcription factors, plays paramount roles in a plethora of developmental and physiological processes. In the current study, we systematically characterized the putative TCP genes and their response to abiotic stress in eggplant. 30 SmTCP genes were categorized into two subfamilies based on the classical TCP conserved domains. Chromosomal location analysis illustrated the random distribution of putative SmTCP genes along 12 chromosomes of eggplant. Cis-acting elements and miRNAs target prediction showed that they could involve in gene transcriptional regulation of SmTCPs, and three miRNAs (miR319a, miR319b, and miR319c-3p) might be major regulators targeting SmTCPs. Tissue-expression pro les indicated divergent spatiotemporal expression patterns of SmTCPs. qRT-PCR assays showed different expression pro les of SmTCP genes under 4 ℃, drought and ABA treatments, suggesting the possible participation of SmTCP genes in multiple signaling pathways. Furthermore, RNA-Seq data of eggplant anthocyanin synthesis coupled with yeast one-hybrid and dual-luciferase assays suggested the involvement of the SmTCP genes (Smechr0202855.1 and Smechr0602431.1) in the mediation of anthocyanin synthesis. Our study will facilitate further investigation on the putative functional characterization of eggplant TCP genes and lay a solid foundation for the in-depth study of SmTCP genes in the regulation of anthocyanin synthesis. Key MessageThe putative TCP genes and their responses to abiotic stress in eggplant were comprehensively characterized, and the SmTCP genes (Smechr0202855.1 and Smechr0602431.1) may involve in anthocyanin synthesis.

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