Table 2.

The rank of RGs for normalization and their expression stability values calculated by the ΔCt method.

Rank position	Developmental stage		Cold		Drought		Total
	Gene	Average of STDEV	Gene	Average of STDEV	Gene	Average of STDEV	Gene	Average of STDEV
1	PP2A59γ	1.354	RPL5B	1.015	PP2A59γ	0.812	UBCE32	1.185
2	RPL5B	1.354	PP2A59γ	1.024	CPY20-1	0.857	RPL5B	1.223
3	UBCE32	1.357	UBCE32	1.055	UBCE32	0.858	PP2A59γ	1.253
4	UBC18	1.426	RPL13	1.064	RPL13	0.883	RPL13	1.254
5	G6PDH	1.446	EIF4A-14	1.081	UBC18	0.928	EIF4A-14	1.282
6	CPY20-1	1.464	PP2A57θ	1.129	UPL-RHF2A	0.931	CPY20-1	1.298
7	EIF4A-14	1.495	G6PDH	1.172	RPL5B	0.978	PP2A57θ	1.308
8	PP2A57θ	1.499	CPY20-1	1.177	PP2A57θ	0.990	G6PDH	1.353
9	RPL13	1.523	EF1α	1.294	EIF4A-14	1.020	UBC18	1.386
10	TUBα3	1.570	UPL-RHF2A	1.299	ABCC8	1.060	TUBα3	1.464
11	GAPDH	1.658	UBC18	1.379	EF1α	1.069	UPL-RHF2A	1.549
12	ABCC8	1.851	TUBα3	1.379	G6PDH	1.206	GAPDH	1.579
13	UPL-RHF2A	2.077	GAPDH	1.519	TUBα3	1.221	ABCC8	1.692
14	EF1α	2.401	ABCC8	1.815	GAPDH	1.364	EF1α	2.179
15	ACTβ	2.429	ACTβ	2.977	ACTβ	2.864	ACTβ	2.996