Table 3.

Ranking of the candidate reference genes and their expression stability values calculated by NormFinder.

	Total		Tissue		Abiotic stress
Rank	Gene	Stability	Gene	Stability	Gene	Stability
1	RPL15	0.038	RPL15	0.019	RPL15	0.011
2	PP2A-4	0.073	APT3	0.019	APT3	0.011
3	APT3	0.076	TUB4	0.023	PP2A-4	0.023
4	eIF2	0.097	PP2A-4	0.042	TUB4	0.030
5	TUB4	0.105	eIF2	0.125	eIF2	0.046
6	AP-2	0.149	UBC29	0.142	UBC19	0.189
7	UBC19	0.154	UBC19	0.158	AP-2	0.224
8	ACT7	0.250	AP-2	0.189	ACT7	0.389
9	UBC22	0.337	ACT7	0.269	UBC22	0.761
10	UBC29	0.571	UBC22	0.392	UBC29	1.151