Table 3. Ranking orders of the candidate reference genes according to their standard deviation calculated Bestkeeper algorithm.

Rank	Total	Wounding	Drought	Salt	Heat	Cold	Tissue	MJ	SA	ABA	Biotic
1	UBQ	RPL2	UBQ	EF-1	T-SAND	18S-rRNA	CYP	T-SAND	T-SAND	UBQ	TUB
SD	0.78	0.19	0.29	0.36	0.75	0.29	0.39	0.57	0.24	0.28	0.12
2	RPL2	CYP	RPL2	GAPDH	ACT	TUB	EF-1	RPL2	UBQ	CYP	RPL2
SD	0.91	0.22	0.34	0.42	0.98	0.66	0.44	0.67	0.32	0.52	0.14
3	CYP	18S-rRNA	26S	T-SAND	RPL2	CYP	UBQ	EF-1	RPL2	EF-1	UBQ
SD	1.04	0.35	0.35	0.54	1	0.7	0.52	0.7	0.44	0.56	0.16
4	EF-1	26S	CYP	26S	18S-rRNA	UBQ	26S	CYP	EF-1	T-SAND	EF-1
SD	1.09	0.43	0.45	0.6	1.3	0.75	0.56	0.78	0.45	0.82	0.23
5	T-SAND	UBQ	18S-rRNA	TUB	26S	RPL2	GAPDH	UBQ	18S-rRNA	TUB	18S-rRNA
SD	1.29	0.45	0.46	0.73	1.72	0.92	0.68	0.8	0.59	0.97	0.25
6	26S	T-SAND	EF-1	CYP	GAPDH	T-SAND	TUB	TUB	CYP	26S	ACT
SD	1.37	0.48	0.47	0.83	2.27	0.95	0.85	0.99	0.69	0.99	0.32
7	TUB	TUB	GAPDH	RPL2	CYP	EF-1	RPL2	26S	26S	RPL2	T-SAND
SD	1.48	0.53	0.59	0.93	2.35	0.96	0.93	1.06	0.71	1.01	0.38
8	GAPDH	EF-1	T-SAND	TUA	TUB	26S	TUA	TUA	TUA	18S-rRNA	TUA
SD	1.62	0.65	0.63	1	2.51	1.35	0.94	1.08	0.89	1.03	0.48
9	ACT	ACT	ACT	UBQ	UBQ	ACT	18S-rRNA	18S-rRNA	TUB	TUA	26S
SD	1.9	0.96	0.69	1.04	2.55	1.7	1.73	1.39	1.04	1.39	0.5
10	TUA	GAPDH	TUB	ACT	EF-1	GAPDH	ACT	ACT	ACT	ACT	CYP
SD	1.91	1.02	1.04	1.36	2.65	1.71	1.84	1.43	1.73	1.83	0.64
11	18S-rRNA	TUA	TUA	18S-rRNA	TUA	TUA	T-SAND	GAPDH	GAPDH	GAPDH	GAPDH
SD	2.06	1.56	1.45	1.61	4.45	2.09	2.65	1.53	1.8	1.9	0.97

Note. Reference genes with SD values greater than 1 are considered as inconsistent and should be excluded.