Table 4.

Micro element composition of all nutrient solutions used

Nutrient solution	Micronutrients (mmol L−1)
	Fe	B	Cu	Zn	Mn	Mo	I	Co
Hermans et al. [25]	20.0	10.0	0.10	1.00	1.00	0.07	0.00	0.00
Murashige and Skoog [23]	100	100	0.32	30.0	100.0	1.00	5.00	0.10
Murashige and Skoog [23] ($1/4\times$)	25.0	25.0	0.08	7.50	25.0	0.25	1.25	0.03
Conn et al. [6]	50.0	50.0	0.50	10.0	5.00	0.10	0.00	0.00
Hoagland and Arnon [22]	40.0	46.3	0.32	0.77	9.15	0.11	0.00	0.00
Tocquin et al. [24]	22.4	9.68	0.22	0.31	2.03	0.14	0.00	0.09
HYPONeX Japan Co. Ltd.	50.0	23.0	0.30	0.66	4.50	0.13	0.00	0.00
Somerville and Ogren [21] used by Arteca and Arteca [9]	17.0	70.0	0.50	1.00	14.0	0.20	0.00	0.01

Salt recipes are provided in Additional file 13