calcium movement

I noticed several posts stating that Calcium does not move through the
vascular systems of Aquatic Plants.  I find this puzzling. Many of the plants
grow vigorously, often blooming, in the emersed form. How do the emersed
plants move Calcium?  I am not challenging the statement, I just do not
understand it. Could you give me some Refereed Journal research references
that I could look up?