Table 1. Nuclear DNA ploidy distribution in the first pair of leaves of the exi mutants.

Genotype	Ploidy level
	2C	4C	8C	16C	32C
Ler	23.4±2.8 (22.3)	27.5±1.1 (27.7)	35.0±1.3 (35.2)	13.3±2.6 (13.9)	0.8±0.3 (0.7)
exi1-2	29.2±1.2 (29.1)	27.3±1.1 (27.4)	30.8±2.3 (30.4)	11.2±2.0 (12.4)	1.5±0.6 (1.6)
exi2	27.6±1.0 (27.5)	34.5±1.1 (34.3)	31.9±1.5 (31.9)	5.4±0.8 (5.4)	0.6±0.1 (0.7)
exi5	32.7±1.3 (32.7)	34.1±0.6 (34.1)	28.8±1.2 (28.9)	3.9±0.5 (4.0)	0.5±0.1 (0.5)

Values are mean±standard deviation. The median is shown in parentheses. Significant differences (P value<0.01, n = 10) from the Ler control are in bold. Values higher than those of Ler control are in italics. Data analysis was performed as indicated in Materials and Methods. All plants were homozygous for the mutations indicated.