In our recent work we realized that In root outer cell layers there were Fulvic acid compounds bound to heavy metals. It’s really weird to see such a compound in root tissues of rice seedlings growing under hydroponic culture! I hope if any expert could explain this result. Everyone knows that plant systems are unable to form Fulvic acid or at least no one has yet observed or claimed this in the literature. Our XANES result showed that this compound doesn’t carry any carboxylic group and is very much similar to FA structure. It would be appreciated if anyone of you could explain this finding.

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