Table 1.

Transcription factors that have been shown to directly modulate the expression of genes related to IAA metabolism

Target	Transcriptional regulator(s)	Structural type	Biological process(es)	References
YUC1	ARR1, ARR10, ARR12	B-ARR	Shoot stem cell niche maintenance	Meng et al. 2017
	SUP	C2H2-type zinc finger	Floral patterning	Xu et al. 2018
YUC4	LEC2	B3 domain	Embryogenesis	Stone et al. 2008
	SHI/STY1	RING-like zinc finger	Leaf and flower development	Eklund et al. 2010
	ARR1, ARR10, ARR12	B-ARR	Shoot stem cell niche maintenance	Meng et al. 2017
	LEC2, FUS3	B3 domain	Lateral root formation	Tang et al. 2017
	SUP	C2H2-type zinc finger	Floral patterning	Xu et al. 2018
	CRC	C2C2 type zinc finger	Floral determinacy	Yamaguchi et al. 2018
	AG	MADS	Floral determinacy	Yamaguchi et al. 2018
YUC5	IDD14, IDD15, IDD16	IDD	Organ morphogenesis, gravitropism	Cui et al. 2013
YUC8	PIF4	bHLH	Hypocotyl elongation at high temperature	Franklin et al. 2011
YUC9	EIN3	EIL	Aluminum-induced root growth inhibition	Liu et al. 2016b
TAA1	PIF4	bHLH	Hypocotyl elongation at high temperature	Franklin et al. 2011
	IDD14, IDD15, IDD16	IDD	Organ morphogenesis, gravitropism	Cui et al. 2013
	SPT	bHLH	Gynoecium development	Reyes-Olalde et al. 2017
	ARR1s	B-ARR	Light-induced tissue-specific IAA synthesis	Yan et al. 2017
CYP79B2	PIF4	bHLH	Hypocotyl elongation at high temperature	Franklin et al. 2011
UGT76F1	PIF4	bHLH	Hypocotyl elongation at high temperature	Chen et al. 2020
OsYUC8	OsEIL1	EIL	Ethylene-mediated primary root elongation	Qin et al. 2017
ZmGH3.2	ZmDREB2A	AP2/ERF	Longevity of maize seed	Han et al. 2020
GH3.2 GH3.6	MYB30	R2R3-MYB	Root growth	Zhao and Xue 2020

(Os) Oryza sativa, (Zm) Zea mays; otherwise Arabidopsis thaliana.