Table 2. GO enrichment analysis of co-expressed genes of rice DREB1 homologs using agriGO software.

GO ID	Biological process	Total number of genes in the category	Number of co-expressed genes for each OsDREB1 (a),P-values of Fisher exact test for enrichment analysis (b),and number of cold-responsive genes (c).
			Os01g73770	Os02g45450	Os04g48350	Os06g03670	Os09g35010	Os09g35030	Os08g43200	Os08g43210
0006950	response to stress	1053	18a (15c)	21 (15)	11 (7)	14 (12)	24 (19)	18 (17)	13 (1)	11 (2)
			8.4E−11b	2.3E−12	4.2E−08	5.0E−08	1.0E−15	2.5E−10	3.7E−07	4.5E−06
0009628	response to abiotic stimulus	67	10	6	10	8	8	12		7
			4.9E−16	1.8E−08	6.2E−19	1.1E−12	4.0E−12	1.6E−19		4.0E−11
0009607	response to biotic stimulus	20	6	15		6	11	5	7
			3.2E−12	2.2E−35		1.8E−12	1.7E−24	8.6E−10	8.1E−15
0009605	response to external stimulus	34	5	10		6	12	6
			1.0E−08	1.2E−18		6.0E−11	1.3E−23	1.7E−10
0009719	response to endogenous stimulus	49	13	15	7	14	11	11	9
			7.3E−24	2.1E−27	1.2E−13	1.3E−26	2.7E−19	3.1E−19	9.0E−16