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@@ Iron is an essential nutrition element for all organisms. It functions as a component of many important enzymes and proteins involved in fundamentally biochemical processes. Iron deficiency causes anaemia afflicting more than one billion peoples worldwide. Improving crops to increase iron content and bioavailability in edible part is the most economic and efficient method to fight the iron deficiency in human health. In plants, iron is also one of the most common elements limiting plant growth because it exists predominantly in an oxidized ferric form [Fe(Ⅲ)] in aerobic environments.