Table II.

Expression of RLK/Pelle genes under abiotic and biotic stress conditions

Response:	Up-Regulation				Down-Regulation
Statistical Test:	RLK/Pellea		Tandem/Nontandemb		RLK/Pellea		Tandem/Nontandemb
	P	O/Uc	P	O/Uc	P	O/Uc	P	O/Uc
Abiotic stress conditions
UV-B	9.36E-25	O (28)d	0.002	O (37)e	4.58E-05	O (17)d	5.64E-04	U (6)e
Wounding	1.61E-06	O (10)	0.237	(12)	8.42E-06	O (5)	0.062	(2)
Drought	0.033f	U (0.5)	0.244	(0)	0.158	(0.2)	0.139	(0.5)
Cold (4°C)	0.718	(13)	0.690	(12)	2.84E-07	O (25)	0.064	(19)
Heat	1.00E-04	U (10)	0.699	(9)	0.377	(21)	0.174	(17)
Salt	0.771	(8)	0.141	(5)	0.561	(9)	0.479	(10)
Osmotic	5.15E-04	O (19)	0.601	(19)	1.49E-06	O (24)	5.76E-04	U (14)
Biotic stress conditions
Flg22	1.37E-47	O (18)	0.010f	O (23)	0.279	(5)	0.008f	U (1)
GST-NPP1	2.51E-28	O (13)	0.012f	O (17)	0.195	(3)	0.108	(1)
HrcC−	1.31E-48	O (19)	6.62E-05	O (28)	0.002	O (6)	0.104	(3)
P. infestans	2.52E-17	O (18)	0.076	(22)	0.008f	O (12)	0.011f	U (6)
P. syringae pv phaseolicola	1.57E-44	O (25)	0.012f	O (31)	0.029f	O (10)	0.009f	U (4)
HrpZ	4.02E-43	O (23)	0.013f	O (28)	0.555	(7)	0.008f	U (2)
AvrRpm1	3.18E-04	O (14)	0.676	(12)	0.024f	O (12)	0.207	(9)
DC3000	0.393	(12)	0.710	(12)	6.61E-07	O (20)	0.514	(17)

^aχ² tests were conducted to determine whether RLK/Pelle genes were overrepresented among genes up- or down-regulated by stress conditions compared with all Arabidopsis genes.

^bχ² tests were conducted to determine whether tandem RLK/Pelle genes were over-represented among genes up- or down-regulated by stress conditions compared with nontandem RLK/Pelles.

^cO and U indicate whether significant differences are due to overrepresentation or underrepresentation, respectively.

^dNumbers in parentheses indicate the percentage of RLK/Pelle genes that are up- or down-regulated.

^eNumbers in parentheses indicate the percentage of tandem RLK/Pelle genes that are up- or down-regulated.

^fNot significant after adjusting for multiple testing with sequential Bonferroni adjustment.