After 58days, Fe10 plants remained green (49238 mmol Chlm2)
but Fe0 plants were chlorotic (148 24 mmol Chl m2). At this
time point, plants were transferred individually to 1-L glass jars
that contained nutrient solution. Four Fe10 plants were grown
in the continued presence of 10 mM Fe and four Fe0 plants
were grown in the continued absence of Fe (positive and
negative controls, respectively). Iron was resupplied to six Fe0
plants by two distinct treatments: (i) foliar spray (Fe-leaves), i.e.
plants grown in nutrient solution without Fe were sprayed
three times every two days with a solution of 1.8 mM Fe as