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Q.

Excess of manganese in plants induces the deficiency symptoms of iron, magnesium and calcium because it

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a

competes with iron and calcium for uptake.

b

competes with iron and magnesium for enzyme activation.

c

inhibits calcium translocation in shoot apex and competes with iron and magnesium for uptake.

d

inhibits translocation of iron in shoot apex and competes with Ca and Mg for uptake.

answer is C.

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Detailed Solution

Manganese competes with iron and magnesium for uptake and with magnesium for binding with enzymes. Manganese also inhibit calcium translocation in shoot apex. Therefore, excess of manganese may induce deficiencies of iron, magnesium and calcium.

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