Table 1.

Morphological properties of newborn neurons in WT and mutant mice

			Area under the curve			Number of nodes			Total dendritic length
DPI	Genotype	n	(μm2)	F	P		F	P	(μm)	F	P
14	WT (control)	29	3531 ± 178	F2.90 = 2.7	0.041	5.6 ± 0.3	F2.90 = 7.7	0.0001	302.2 ± 16.3	F2.90 = 2.9	0.039
	α2-KO	24	3522 ± 187		N.S	5.7 ±0.3		N.S	289.9 ± 19.9		NS
	α4-KO	21	3021 ± 187		0.028	3.9 ± 0.25		0.0002	237.4 ± 18.7		0.01
	δ-KO	20	3715 ± 200		N.S	5.85 ± 0.25		N.S	314.4 ± 21.3		NS
28	WT (control)	22	6368 ± 251	F2.77 = 4.8	0.004	5.4 ± 0.21	F2.77 = 9.68	0.001	689.2 ± 35.1	F2.77 = 1.1	< 0.0001
	α2-KO	26	5519 ± 250		0.02	4.46 ± 0.21		0.006	581 ± 32.5		0.03
	α4-KO	19	4964 ± 318		0.04	4.05 ± 0.3		0.0004	468.6 ± 41.6		< 0.0001
	δ-KO	14	6814 ± 242		N.S	5.9 ± 0.33		N.S	778.3 ± 40.2		N.S
42	WT (control)	23	5921 ± 216	F2.52 = 9.79	0.002	5.9 ± 0.28	F2.52 = 13.3	< 0.001	639.4 ± 25.9	F2.52 = 13.1	< 0.001
	α2-KO	36	4709 ± 218		0.0002	4.2 ± 0.23		< 0.0001	465.5 ± 33.4		0.0001
	α4-KO	27	4612 ± 191		0.0002	4.18 ± 0.24		< 0.0001	413.3 ± 28.8		< 0.0001

n, number of GFP+ cells. Values are given as mean ± SEM, with the corresponding P value of post hoc analysis. For each time-point and genotype, the cells analyzed were derived from four or five mice successfully injected with eGFP retroviruses. ‘Area under the curve’ represents the distribution of the number of intersections with concentric circles as a function of distance from the soma (see Fig. 3). Statistical comparisons are between genotypes at defined time-points.