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Cut or excised leaves remain green for l...

Cut or excised leaves remain green for long if induced to root of dipped in

A

gibberellins

B

cytokinins

C

auxins

D

ethylene

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Cut or excised leaves remain green for long if induced to root or dipped in?", we need to analyze the options provided and understand the role of each phytohormone in plant physiology. ### Step-by-Step Solution: 1. **Understanding the Question**: The question asks which substance, when applied to cut or excised leaves, helps them remain green for an extended period. 2. **Analyzing the Options**: - **Gibberellins**: These are hormones that promote stem elongation and are involved in processes like seed germination and flowering. They do not primarily help in retaining leaf color. - **Cytokinins**: These hormones are known for promoting cell division and delaying senescence (aging) in plants. They help maintain chlorophyll levels, which keeps leaves green for a longer time. - **Auxins**: These hormones are primarily involved in the regulation of plant growth, particularly in apical dominance and root formation. They do not specifically help in retaining leaf color. - **Ethylene**: This is a gaseous hormone that promotes fruit ripening and senescence. It would not help in keeping leaves green. 3. **Identifying the Correct Answer**: Among the options, **cytokinins** are the most effective in delaying leaf senescence and maintaining chlorophyll, thus keeping the leaves green for a longer duration. 4. **Conclusion**: The correct answer to the question is **cytokinins**. ### Final Answer: Cut or excised leaves remain green for long if induced to root or dipped in **cytokinins**. ---
To solve the question "Cut or excised leaves remain green for long if induced to root or dipped in?", we need to analyze the options provided and understand the role of each phytohormone in plant physiology. ### Step-by-Step Solution: 1. **Understanding the Question**: The question asks which substance, when applied to cut or excised leaves, helps them remain green for an extended period. 2. **Analyzing the Options**: - **Gibberellins**: These are hormones that promote stem elongation and are involved in processes like seed germination and flowering. They do not primarily help in retaining leaf color. ...
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