Table 1.

Frequency of occurrence of known cis-elements in OsWRKY13-regulated genes^a

Cis-Element type	Type of transcription factor	Motif sequence	Observed occurrenceb			Expected occurrence			Reference
			Up	Down	Total	Up	Down	Total
W-box (core)	WRKY	TTGAC	922*	999	1921*	780	950	1729	21
W-box	WRKY	TTGAC(C/T)	509*	529	1038*	409	498	907	21
W-box	WRKY	TTGACC	211	243	454	177	216	393	21
W-box	WRKY	TTGACT	298*	287	585*	232	283	515	21
W-box	WRKY	TTTGAC(C/T)	194	238	432	181	220	401	19
W-box	WRKY	TTGACA	269	303	572	249	304	553	21
G-box	bZIP, GBF, bHLH	CACGTG	89	113	202	90	109	199	36
as-1	bZIP, TGA-type	TGACG	498	637	1135	482	587	1069	37
DRE	AP2/EREBP, DREB	ACCGACA	26	25	51	30	36	66	38
CRT	AP2/EREBP, CBF	(A/G)CCGAC	270	290	560	275	336	611	39
GCC-box	AP2/EREBP, AP2	GCCGCC	543*	461*	1004*	623	759	1383	40
MADS	MADS	CC(A/T)6CG	30	29	59	27	33	61	41
NACRS	NAC	CATGTG	287	378	665	294	358	651	42
Myb1	MYB	(A/C)TCC(A/T)ACC	58	72	130	62	75	137	37
Myb2	MYB	TAAC(G/C)GTT	13	18	31	13	16	28	37
Myb3	MYB	TAACTAAC	19	35*	54*	13	16	29	37
Myb4	MYB	A(A/C)C(A/T)A(A/C)C	511	659	1170	515	627	1142	37
EIN3/EIL	EIN3/EIL	GGATGTA	39	33	72	39	47	85	43
CCAATBOX1	heat shock element	CCAAT	858	1015	1873	858	1045	1903	44

^aOnly the cis-elements putatively bound by the transcription factor types or related ones (Additional file 3), whose expression was regulated by OsWRKY13, were analyzed.

^bP-values < 0.05 (chi-square test and corrected for multiple comparisons using the Bonferroni correction) in each category are indicated with an asterisk.