TABLE 1.

A. thaliana CAT2 mutant alleles

Accession number: AtCAT2: AT4G35090.1.

Allele name	Amino acid position	Amino acid	Mutant amino acid	HU survivala	Catalase activityb	S.E.
					% of wt
cat2-1c	4th exond			76	19.3	2.4
cat2-2e	3rd exond			79	14.1	4.4
cat2-3	61	E	K	81	29.9	3.9
cat2-4	73	G	D	NDf	ND	ND
cat2-5	104	S	F	57	29.6	2.1
cat2-6	111	G	E	37	29.4	4.0
cat2-7	114	E	K	82	59.0	7.1
cat2-8	137	G	R	78	40.6	5.2
cat2-9	182	S	N	69	19.0	4.2
cat2-10	185	M	I	28	38.8	2.6
cat2-11	251	A	T	73	15.7	0.7
cat2-12	265	P	L	80	21.8	2.4
cat2-13	267	W	Stop	70	49.4	7.1
cat2-14	293	W	Stop	72	38.3	5.4
cat2-15	332	G	R	99	18.6	3.3
cat2-16	344	R	Q	97	30.2	5.2
cat2-17	450	W	Stop	94	23.6	1.8
cat2-18	473		No splice	93	31.3	3.4
cat2-19	480	Q	Stop	80	21.2	3.7

^a Average germination rate for plants grown on 5, 10, and 25 mm HU. For wild-type plants, this value is zero.

^b All measured mutant catalase activities were significantly lower than that of the wild type (95% CL, 1-way analysis of variance, Tukey post-test, GraphPad Prism 5.0).

^c SALK_076998 T-DNA line.

^d As described (20).

^e SALK_057998 T-DNA line.

^f ND, not determined.