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Find the correct statements 1. Causal ...

Find the correct statements
1. Causal organism of foolish seedling disease is source of gibberellin
2. Absicisic acid is growth promoter
3. Ratio of auxin to cytokinin controls differentiation
4. Bolting of cabbage can be induced by treatment with IAA

A

1, 2, 3 correct

B

1, 2 correct

C

2, 4 correct

D

1, 3 correct.

Text Solution

AI Generated Solution

The correct Answer is:
To find the correct statements from the given options, we will analyze each statement one by one. ### Step 1: Analyze Statement 1 **Statement:** Causal organism of foolish seedling disease is a source of gibberellin. **Analysis:** The foolish seedling disease is caused by the fungus *Gibberella fujikuroi*. This fungus is indeed a source of gibberellin, specifically gibberellic acid, which was first isolated from it. **Conclusion:** This statement is **correct**. ### Step 2: Analyze Statement 2 **Statement:** Abscisic acid is a growth promoter. **Analysis:** Abscisic acid (ABA) is known as a plant growth inhibitor and is often referred to as a stress hormone. It inhibits growth and promotes processes like abscission (the shedding of leaves or fruit). **Conclusion:** This statement is **incorrect**. ### Step 3: Analyze Statement 3 **Statement:** Ratio of auxin to cytokinin controls differentiation. **Analysis:** The ratio of auxins (which promote root development) to cytokinins (which promote shoot development) is crucial in controlling plant differentiation and morphogenesis. This relationship is well-established in plant biology. **Conclusion:** This statement is **correct**. ### Step 4: Analyze Statement 4 **Statement:** Bolting of cabbage can be induced by treatment with IAA. **Analysis:** Indole-3-acetic acid (IAA) is a naturally occurring auxin. However, bolting in cabbage is primarily induced by gibberellic acid, not IAA. Therefore, IAA does not promote bolting. **Conclusion:** This statement is **incorrect**. ### Final Conclusion The correct statements are: 1. Causal organism of foolish seedling disease is a source of gibberellin. (Correct) 3. Ratio of auxin to cytokinin controls differentiation. (Correct) Thus, the final answer is that statements 1 and 3 are correct. ---
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