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[compost_tea] chelate question for the chemists out there



I recently read that the "chelation process removes the positive charge 
from metals [such as iron], allowing the neutral or slightly negatively 
charged chelated molecule to slide through the pores on the leaf [I assume 
they mean the stomata] and root surface more rapidly.
"These pores are negatively charged, so there is a problem with fixation of 
positively charged minerals at the pore entrance.  There is no such 
restrictive barrier for the neutral, chelated mineral."
I was under the impression that beneficial bacteria were required to 
separate the chelate from the metal in order for the plant to actually use 
it.  How can this happen if the molecule slips inside the plant first?
Are there bacteria/fungi INSIDE the plant that then break down the chelated 
product?
OR can both process occur: some of the molecules are broken down by 
beneficial organisms break and some go inside the plant without being 
broken down and are used "as is"?

Many thanks!
Paulette


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