Table 2.

Expression stability of the 10 candidate reference genes calculated by NormFinder.

Rank	Salt treatment		Drought treatment		Heat treatment		Cold treatment		ABA treatment		Different organs		Total samples
	Gene	Stability	Gene	Stability	Gene	Stability	Gene	Stability	Gene	Stability	Gene	Stability	Gene	Stability
1	PP2A	0.06	UBC	0.033	ACT	0.008	EF1-α	0.018	GAPDH	0.017	EF1-α	0.045	EF1-α	0.068
2	HSP	0.066	EF1-α	0.047	PP2A	0.01	CYP	0.037	His	0.041	TUA	0.053	His	0.08
3	EF1-α	0.09	GAPDH	0.061	TUA	0.024	GAPDH	0.07	PP2A	0.049	GAPDH	0.067	GAPDH	0.08
4	CYP	0.096	PP2A	0.064	GAPDH	0.03	His	0.075	EF1-α	0.049	TUB	0.073	PP2A	0.1
5	GAPDH	0.099	His	0.067	CYP	0.036	ACT	0.077	CYP	0.056	His	0.084	TUB	0.116
6	TUB	0.1	TUB	0.079	TUB	0.037	UBC	0.089	TUB	0.061	UBC	0.114	CYP	0.123
7	TUA	0.102	ACT	0.095	His	0.038	PP2A	0.094	TUA	0.095	HSP	0.136	ACT	0.132
8	His	0.106	TUA	0.142	EF1-α	0.039	TUA	0.117	ACT	0.112	CYP	0.151	TUA	0.136
9	UBC	0.108	CYP	0.156	HSP	0.133	TUB	0.159	UBC	0.115	ACT	0.157	UBC	0.139
10	ACT	0.151	HSP	0.198	UBC	0.139	HSP	0.217	HSP	0.14	PP2A	0.206	HSP	0.161