Irrespective of the inhibitory treatments, the
Fe uptake rates were greater in plants with Si compared
with the plants without Si. The increase in Fe uptake
by Si application was enhanced in the cotton plants
treated with 2,4-DNP or with their roots exposed to
low temperature and in the canola plants treated with
2,4-DNP and NaCN, whereas in the wheat plants, such
an enhancement was observed when their shoots were
saturated with water vapor or when their roots were
exposed to low temperature