Table 3.

Results of the influence of ABA, PEG, AC and maltose on somatic embryo maturation in P. massoniana.

Medium	Factors					Quantity of somatic embryos (number per mL)
number		ABA (mg/L)	PEG (g/L)	AC (g/L)	Maltose (g/L)
>1		1	110	0.5	20	3.2
2		1	130	1.0	25	2.4
3		1	150	1.5	30	0.4
4		2	110	0.5	30	8.4
5		2	130	1.0	20	34.9
6		2	150	1.5	25	14.9
7		3	110	0.5	25	14.6
8		3	130	1.0	30	9.5
9		3	150	1.5	20	24.4
	yj1	6	26.2	27.6	62.5
	yj2	58.2	46.8	35.2	31.9
	yj3	48.5	39.7	49.9	18.3
	${\overline{y}}_{j1}$	2	8.7	9.2	20.8
	${\overline{y}}_{j2}$	19.4	15.6	11.7	10.6
	${\overline{y}}_{j3}$	16.2	13.2	16.6	6.1
	Rj	17.4	6.9	7.4	14.7
Primary and secondary factor				ABA>Maltose>AC>PEG
Optimal composition				ABA2 + PEG2 + AC3 + Maltose1

ABA, abscisic acid; PEG, polyethylene glycol 8000; AC, activated carbon. y_jk (k=1, 2, 3) is the sum of test results with the same level of k in the j_th column of the table; ${\overline{y}}_{jk}$ is the mean value of the test results with the same level of k in the j_th column of the table; R_j is the range of ${\overline{y}}_{jk}$ .R_j=max( ${\overline{y}}_{jk}$ )- min( ${\overline{y}}_{jk}$ ).