Skip to main content
. 2023 Apr 26;13(5):750. doi: 10.3390/biom13050750

Figure 4.

Figure 4

The role of Arabidopsis TCPs in the development of flower organs. CIN TCPs repress cell proliferation and promote cell differentiation in petals. Repression of CIN TCP expression by RBE at the early stages of petal development is required for optimal petal growth. AtTCP4 and other CIN TCPs regulated by miR319 also participate in the modulation of hormonal responses related to stamen maturation influencing the expression of miR167-dependent AUXIN RESPONSE FACTORs (ARFs) 6 and 8. AtTCP15 and related class I TCPs promote cell expansion in stamen filaments through direct regulation of a group of SAUR genes. These TCPs also participate in gynoecium development acting on cytokinin- and auxin-dependent processes. Another class I protein, AtTCP16, affects cell division in the male gametophyte and is required for optimal pollen development. Class I and CIN TCPs are depicted in pink and cyan, respectively. Transcriptional regulations are shown in black. Brown lines denote post-transcriptional regulation by miRNAs. Arrows and T-shaped lines denote positive and negative regulation, respectively. Details about these and other roles of TCPs during the development of flower organs are provided in Section 4 and Section 5.