Question

In general, longer the plant is in contact with nitrate, there would be

• A. Constant accumulation of nitrate reserve
• B. Greater nitrogen fixation
• C. No effect on nitrate accumulation
• D. Reduced denitrification

Hint:

Nitrate in plants:
- Plants store nitrate in vacuoles.
- Prolonged nitrate exposure leads to accumulation.
- Nitrate is reduced to ammonium for assimilation.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of nitrate uptake and accumulation in plants.

Step 2: Detailed Explanation:
In general, longer the plant is in contact with nitrate, there would be constant accumulation of nitrate reserve (A).
Plants can store nitrate in their vacuoles.
Prolonged exposure to nitrate leads to accumulation.
Other options:
- Greater nitrogen fixation (B): Nitrogen fixation is not nitrate uptake.
- No effect on nitrate accumulation (C): Incorrect.
- Reduced denitrification (D): Denitrification is a microbial process, not plant uptake.
Thus, nitrate reserves accumulate over time.

Step 3: Final Answer:
Thus, longer contact with nitrate leads to constant accumulation of nitrate reserve, which corresponds to option (A).
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