Question:
Manganese competes with _________ and _________ for uptake, but inhibits translocation of calcium to shoot apex in plants.
Manganese competes with _________ and _________ for uptake, but inhibits translocation of calcium to shoot apex in plants.
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Excess manganese competes with iron and magnesium and blocks calcium movement to the shoot apex.
Updated On: Nov 12, 2026
- Iron and Magnesium
- Iron and Potassium
- Magnesium and Potassium
- Iron and Calcium
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
Excess manganese is toxic partly because it interferes with other nutrients.
Step 2: What it competes with
Manganese competes with iron and with magnesium at the uptake stage.
It also inhibits the translocation of calcium to the shoot apex.
Step 3: Conclusion
So Mn toxicity can show as iron, magnesium and calcium deficiency.
The correct pair for uptake competition is iron and magnesium.
Final Answer:
Manganese competes with iron and magnesium for uptake, option (A). \[ \boxed{\text{(A) }\text{Iron and Magnesium}} \]
Excess manganese is toxic partly because it interferes with other nutrients.
Step 2: What it competes with
Manganese competes with iron and with magnesium at the uptake stage.
It also inhibits the translocation of calcium to the shoot apex.
Step 3: Conclusion
So Mn toxicity can show as iron, magnesium and calcium deficiency.
The correct pair for uptake competition is iron and magnesium.
Final Answer:
Manganese competes with iron and magnesium for uptake, option (A). \[ \boxed{\text{(A) }\text{Iron and Magnesium}} \]
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