Table 1.

The concentration of micronutrients in the root biomass of white mustard grown for two weeks under different sulphur and/or nickel concentrations in the nutrient solution.

Concentration in the Nutrient Solution (mM)		Concentration of the Micronutrients in the Roots (mg kg−1 DM)
S	Ni	Fe	B	Cl	Cu	Mn	Mo	Zn
2		1378 ± 42.6a	17.24 ± 1.58c	8485 ± 53.87	5.48 ± 0.22ab	47.18 ± 1.02e	0.642 ± 0.093	34.89 ± 0.95d–f
6	0.00	1382 ± 43.0a	22.13 ± 2.73a	8478 ± 70.42	5.72 ± 0.35a	53.37 ± 0.97bc	0.585 ± 0.060	45.57 ± 1.14a
9		1377 ± 52.2a	20.77 ± 1.65b	8498 ± 55.39	5.13 ± 0.56a–c	55.74 ± 0.76a	0.663 ± 0.074	42.61 ± 0.99ab
2		1372 ± 32.5a	18.14 ± 2.51c	8492 ± 97.01	5.01 ± 0.46a–d	54.81 ± 0.84a–c	0.608 ± 0.087	36.28 ± 1.22de
6	0.0004	1380 ± 61.7a	17.29 ± 1.67c	8484 ± 41.66	5.36 ± 0.70ab	53.78 ± 0.66a–c	0.597 ± 0.058	40.67 ± 1.48bc
9		1370 ± 62.7a	17.71 ± 2.49c	8503 ± 84.72	5.29 ± 0.39a–c	51.13 ± 0.80d	0.591 ± 0.051	38.52 ± 1.09b–d
2		1263 ± 21.9c	17.05 ± 2.63c	8473 ± 72.38	4.42 ± 0.31cd	53.19 ± 0.75c	0.617 ± 0.052	31.12 ± 1.14h
6	0.04	1279 ± 42.0c	18.09 ± 2.57c	8488 ± 89.84	4.73 ± 0.66b–d	55.31 ± 0.88ab	0.580 ± 0.041	35.43 ± 0.99de
9		1310 ± 30.4b	17.42 ± 1.66c	8482 ± 75.05	4.16 ± 0.54d	54.02 ± 0.76ac	0.635 ± 0.049	33.74 ± 1.16e–h
2		1307 ± 36.1b	18.59 ± 1.67c	8500 ± 59.32	4.87 ± 0.57a–d	51.04 ± 0.64d	0.659 ± 0.102	28.13 ± 0.94hi
6	0.08	1299 ± 33.2b	17.35 ± 1.48c	8477 ± 93.41	5.07 ± 0.61a–c	54.28 ± 0.93a–c	0.668 ± 0.044	31.37 ± 1.21f–h
9		1313 ± 42.2b	18.28 ± 2.53c	8492 ± 84.85	5.34 ± 0.43ab	52.95 ± 0.75cd	0.584 ± 0.057	26.48 ± 0.87i
Main effects
S
2		1330 ± 52.4	17.76 ± 1.48b	8488 ± 70.21	4.95 ± 0.37	51.56 ± 0.43b	0.632 ± 0.027	32.61 ± 0.73c
6		1335 ± 41.4	18.72 ± 1.52a	8482 ± 82.08	5.22 ± 0.23	54.19 ± 0.41a	0.608 ± 0.024	38.26 ± 1.64a
9		1342 ± 59.0	18.55 ± 1.41ab	8494 ± 70.83	4.98 ± 0.69	53.46 ± 0.48a	0.618 ± 0.019	35.34 ± 0.68b
Ni
0		1379 ± 44.8a	20.05 ± 1.64a	8487 ± 91.37	5.44 ± 0.45a	52.10 ± 0.67c	0.630 ± 0.037	41.02 ± 0.70a
0.0004		1374 ± 51.3a	17.71 ± 1.58b	8493 ± 72.44	5.22 ± 0.68a	53.24 ± 0.48ab	0.599 ± 0.018	38.49 ± 0.75b
0.04		1283 ± 32.4b	17.52 ± 1.46b	8481 ± 63.36	4.44 ± 0.47b	54.17 ± 0.41a	0.611 ± 0.022	33.43 ± 0.63c
0.08		1306 ± 42.3ab	18.07 ± 1.53b	8490 ± 70.09	5.09 ± 0.64a	52.76 ± 0.45bc	0.637 ± 0.028	28.66 ± 0.59d
Statistical significance
S		NS	*	NS	NS	*	NS	*
Ni		*	*	NS	*	*	NS	*
S × Ni		*	*	NS	*	*	NS	*

Note: The results are presented as the mean ± SD of nine measurements (three measurements made per each of three independent repetition of the experiment over time). Means (n = 9) sharing the same letter in a column do not differ significantly according to Tukey’s multiple range test at p ≤ 0.05; significant effects for the main factors and for interaction between them are indicated with asterisks (*); NS—non-significant.