TABLE 1.

TCP genes implicated in cell growth in Arabidopsis thaliana embryonic organs.

TCP genes	TCP class	Organ	Function	References
TCP20	I	Hypocotyl Root	Reduces cell elongation by targeting cellulose synthase genes	Herve et al., 2009
TCP1	I	Hypocotyl Petiole	Promotes hypocotyl elongation by activating BR-biosynthetic gene DWARF4	Guo et al., 2010
TCP14, 15	I	Hypocotyl	Induce GA-biosynthetic gene GA20ox1 and cell expansion regulators PRE1, HBI1	Ferrero et al., 2019
TCP7, 8, 14, 15, 21, 22, 23	I	Hypocotyl	Promote endoreplication-mediated cell expansion by directly activating CYCD1;1	Zhang et al., 2019
TCP14, 15	I	Hypocotyl	Enhance cell elongation by direct activation of several auxin-response genes	Ferrero et al., 2021
TCP3	II	Hypocotyl	Elongates hypocotyl when miR319-resistant version is overexpressed	Koyama et al., 2007
TCP3	II	Hypocotyl Cotyledon	Suppresses auxin response by activating IAA3/SHY2 and SAUR genes	Koyama et al., 2010a
TCP4	II	Hypocotyl Cotyledon	Promotes hypocotyl elongation when hyperactivated	Sarvepalli and Nath, 2011a
TCP24	II	Hypocotyl	Represses photomorphogenic growth in miR319-dependent manner	Tsai et al., 2014
TCP2	II	Hypocotyl Cotyledon	Promotes photomorphogenic growth by activating HY5 and HYH	He et al., 2016, 2021
TCP4, 2, 3, 10, 24	II	Hypocotyl	Enhance hypocotyl cell elongation by directly activating YUC5	Challa et al., 2016
TCP17	II	Hypocotyl	Promotes shade-induced hypocotyl growth by activating PIFs and YUCs	Zhou et al., 2018
TCP17, 5, 13	II	Hypocotyl	Promote thermoresponsive hypocotyl growth by physical interaction with PIF4 and CRY1	Zhou et al., 2019
TCP5, 13, 17	II	Hypocotyl	Promote thermomorphogenic hypocotyl elongation along with PIF4	Han et al., 2019
TCP4	II	Cotyledon	Promotes cotyledon opening through SAUR genes during seedling de-etiolation	Dong et al., 2019