Abstract:The CPP (cysteinerich polycomblike protein) transcription factor family has a small number of members and is widely distributed in plants and animals. It plays an important role in regulating plant growth and development and responding to abiotic stress. In this study, 10 CsCPP transcription factors were obtained by systematic identification of the tea plant genome, all of which have typical CXC domains. The phylogenetic analysis divided the CsCPP family members into four categories (A-D), and most of the members were closer to the evolutionary relationship of the grapes. The CXC domains of class A and class C members were distributed at the Nterminus of the protein sequence, while the class B and class D members were distributed at the Cterminus. The expression analysis of tea plant tissues indicated that CsCPP transcription factors were highly expressed in the growing active apical buds and young leaves. The order of expression of different tissues was mainly: apical buds and young leaves> roots and stems> mature leaves and fruits> old leaves and flowers. Promoter analysis revealed a large number of ABA and drought response elements in the promoter region of the CsCPP family members. The expression levels of six CsCPP members under drought treatment increased to varying degrees. Four of them were upregulated after ABA treatment, suggesting that CsCPP transcription factor may play a positive role in ABAdependent drought stress response. The expression of most CsCPP members was slightly downregulated under low temperature treatment, while the CsCPP2 and CsCPP6 reached more than 2fold at 6 h. These results laid the foundation for further exploration of the function of tea plant CPP transcription factor family.