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Excess of manganese inhibits translocati...

Excess of manganese inhibits translocation of ____to the shoot spex.

A

Calcium

B

potassium

C

iron

D

magnesium

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks which nutrient's translocation to the shoot apex is inhibited by an excess of manganese. 2. **Identifying Nutrient Categories**: Nutrients for plants are divided into two categories: macronutrients (needed in large amounts) and micronutrients (needed in small amounts). Manganese is classified as a micronutrient. 3. **Effects of Excess Manganese**: While manganese is essential in small amounts, an excess can lead to toxicity. This toxicity can interfere with the uptake and translocation of other essential nutrients. 4. **Competition Among Nutrients**: Manganese competes with other nutrients, particularly iron and magnesium, for uptake by the plant. 5. **Impact on Calcium**: The transcript mentions that excess manganese affects magnesium, which in turn inhibits the translocation of calcium to the shoot apex. 6. **Conclusion**: Therefore, the excess of manganese inhibits the translocation of calcium to the shoot apex. **Final Answer**: Excess of manganese inhibits translocation of **calcium** to the shoot apex. ---
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