Botany-Growth Regulators
NEET Botany Growth Regulators MCQ Question
Type: MCQ-fact-Hard-Class 11
Which plant growth regulator was identified as the active substance causing the symptoms of the 'bakanae' disease in rice seedlings?
A
Gibberellic acid
B
Indole-3-acetic acid
C
Cytokinin
D
Auxin
Correct Answer
Option A
Detailed Explanation
The 'bakanae' disease of rice seedlings was caused by the fungal pathogen Gibberella fujikuroi, and the active substances identified that caused the symptoms were later recognized as gibberellic acid.
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