RADIX: rhizoslide platform allowing high throughput digital image analysis of root system expansion

Table 1 (a) Results of the analysis of variance, (b) maximal, minimal and median values and heritability of traits

b	Treatment	Root traits										Shoot traits
		ER_Cr	IC_Cr	Med_Lat		Max_Lat		No_Lat		DW_R [mg]		Shoot traits
		ER_Cr	IC_Cr	1st	2nd	1st	2nd	1st	2nd	Embryonic	Crown	ER_Lf	IC_S	LA_Pix	LA_m	DW_S	SPAD	N
		cm/d	cm	cm	cm	cm	cm	Counts	Counts	mg	mg	Pixel/d	Pixel	Pixel	cm²	g	Relative	%
Max	High	1.77	12.71	1.21	0.77	1.87	2.58	61.93	47.40	29.42	41.89	1914	1998	22,331	108.18	0.343	29.59	5.07
Max	Low	1.31	13.42	0.49	0.84	1.85	2.75	38.14	50.57	22.53	35.50
Min	High	1.44	8.46	1.04	0.15	1.08	0.60	41.33	12.92	28.32	29.92	1023	527	12,261	71.75	0.117	29.59	3.61
Min	Low	1.06	9.17	0.32	0.24	1.06	0.71	17.54	16.37	20.79	15.79
Median	High	1.65	11.12	1.09	0.47	1.45	1.72	50.56	28.90	28.73	34.63	1434	1301	16,556	86.4	0.192	29.59	4.30
Median	Low	1.16	11.83	0.37	0.46	1.48	1.77	26.77	33.30	21.42	22.10
h²mean	High	0.41	0.03	0.72	0.61	0.41	0.69	0.53	0.57	0.07	0.15	0.58	0.53	0.59	0.45	0.46	0	0.52
h²mean	Low	0	0.03	0.26	0.42	0	0.59	0.34	0.30	0.19	0.57

ER _Cr Elongation rate crown roots; intercept, IC _Cs length of crown roots at solution change; Med _Lat length of representative lateral root; Max _Lat maximal lateral root length; No _Lat number of lateral roots; DW _R root dry weight; ER _S shoot pixel count development; intercept, IC _Cr shoot pixel count at solution change; LA _Pix digital leaf area; LA _m measured leaf area; DW _S shoot dry weight; SPAD chlorophyll measurements, N content in the leaf in % of total dry weight. Significance level: *** ≤0.001; ** ≤0.01; * ≤0.05