Question:
Correctly match the herbicide with its mode of development of resistance in plants.
Correctly match the herbicide with its mode of development of resistance in plants.
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Understanding herbicide resistance mechanisms is crucial in designing effective weed management strategies and mitigating resistance development.
Updated On: Apr 11, 2025
- P-2; Q-1; R-4
- P-2; Q-1; R-3
- P-1; Q-2; R-3
- P-4; Q-1; R-3
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The Correct Option is A
Solution and Explanation
Step 1: Understand the herbicide resistance mechanisms.
Imidazolinones (P): Herbicides that target acetolactate synthetase (ALS). Resistance is achieved through transformation with a resistant version of ALS.
Bromoxynil (Q): Inhibits photosynthesis. Resistance is developed via transformation with the bacterial nitrilase gene.
Glufosinate (R): Inhibits glutamine synthetase. Resistance is conferred through transformation with the bar gene from Streptomyces hygroscopicus, which encodes phosphinothricin acetyltransferase.
Step 2: Match the herbicides with their resistance mechanisms.
P - 2: Imidazolinones → Resistant version of acetolactate synthetase
Q - 1: Bromoxynil → Bacterial nitrilase gene
R - 4: Glufosinate → bar gene from Streptomyces hygroscopicus
Final Answer:
The correct answer is \( \boxed{(A)} \).
Imidazolinones (P): Herbicides that target acetolactate synthetase (ALS). Resistance is achieved through transformation with a resistant version of ALS.
Bromoxynil (Q): Inhibits photosynthesis. Resistance is developed via transformation with the bacterial nitrilase gene.
Glufosinate (R): Inhibits glutamine synthetase. Resistance is conferred through transformation with the bar gene from Streptomyces hygroscopicus, which encodes phosphinothricin acetyltransferase.
Step 2: Match the herbicides with their resistance mechanisms.
P - 2: Imidazolinones → Resistant version of acetolactate synthetase
Q - 1: Bromoxynil → Bacterial nitrilase gene
R - 4: Glufosinate → bar gene from Streptomyces hygroscopicus
Final Answer:
The correct answer is \( \boxed{(A)} \).
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