The plants were irrigated with a standard nutrient
solution (SNS) with the following composition: 2.5mM Ca(NO
3
)
2
;
2.5mM KCl; 0.25mM Ca(H
2
PO
4
)
2
; 1.0mM MgSO
4
; 12.5
m
MH
3
BO
3
;
1.0
m
M MnSO
4
;1.0
m
M ZnSO
4
; 0.25
m
M CuSO
4
; 0.2
m
M
(NH
4
)
6
Mo
7
O
24
and 10
m
M Fe-ethylenediamine-di-
o
-hydroxy-phe-
nylacetic acid.