Phytosiderophores have high affinity to

Correct option is B

✅ (b) Fe³⁺
· Phytosiderophores are molecules secreted by graminaceous plants to chelate and solubilize Fe³⁺ (ferric ions) in the rhizosphere.
· They form stable complexes with Fe³⁺, facilitating its uptake under iron-deficient conditions.
· Important in Strategy II iron uptake mechanisms of cereals like wheat, barley, maize.
❌ (a) Fe²⁺
· Fe²⁺ (ferrous ion) is relatively soluble in water and does not require chelation by phytosiderophores.
· Plants directly uptake Fe²⁺ without siderophores.
❌ (c) Both [A] and [B]
· Incorrect as phytosiderophores have specificity for Fe³⁺ and not Fe²⁺.
❌ (d) None of the above
· Incorrect because Fe³⁺ is the primary target of phytosiderophores.