Table 1.

Frequencies of nuclear ploidy classes and mean nuclear DNA content during development.

Tissue	Percent of nuclei					Mean ploidy
	2C	4C	8C	16C	32C
1	69.4 ± 1.1	28.3 ± 0.4	2.2 ± 0.7	0	0	2.7 ± 0.1
2	25.3 ± 1.4	40.8 ± 0.8	30.1 ± 1.2	3.9 ± 1.2	0	5.2 ± 0.1
3	45.5 ± 0.6	36.3 ± 0.2	14.4 ± 0.2	3.8 ± 0.4	0	4.2 ± 0.2
4	19.3 ± 1.1	23.2 ± 1.7	31.2 ± 3.1	26.3 ± 3.4	0	7.8 ± 0.5
5	21.5 ± 3.4	27.4 ± 2.5	20.8 ± 11.1	18.1 ± 3.2	12.2 ± 4.0	10.0 ± 1
6	22.8 ± 1.9	26.2 ± 1.8	17.5 ± 0.7	21.7 ± 2.1	11.8 ± 1.0	10.2 ± 0.5

1: Youngest leaves (less than 3 mm long) from 18-to-19-day-old plants. 2: First and second leaves from 12-day-old plants. 3: 16-day-old seedling shoots. 4: First and second leaves from 19-day-old plants. 5: Third and fourth leaves from 36-to-37-day-old plants. 6: First and second leaves from 36-to-37-day-old plants. Values are means ± standard deviation.