Question:
Which one of the following is lead to abnormality and is not good for clonal forestry programme? ______________
Which one of the following is lead to abnormality and is not good for clonal forestry programme? ______________
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Orthotropic = Straight Up (Good). Plagiotropic = Sideways/Crawling (Bad for trees).
Updated On: Aug 20, 2026
- Orthotropic response
- Plagiotropic response
- Cyclophysis response
- Both 2 & 3
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
In clonal forestry (propagation by cuttings), the behavior of the new plant depends on which part of the parent tree it was taken from. The question asks about undesirable responses.
Step 2: Detailed Explanation:
• Plagiotropic Response (B): This happens when a cutting taken from a horizontal side branch continues to grow horizontally or like a branch, even after it has rooted. It fails to form a straight vertical trunk. This is an "abnormality" for timber production.
• Cyclophysis (C): This is the effect of the "maturational age" of the parent tissue on the cutting. Cuttings from old trees may show reduced rooting and slow growth, appearing "physiologically old" from the start. This is often undesirable in commercial clones.
• Orthotropic Response (A): This is the "good" response, where the cutting grows vertically like a normal seedling. Cuttings from vertical leader shoots usually show this.
• Conclusion: Both Plagiotropism and mature Cyclophysis effects are major hurdles in clonal forestry, often resulting in deformed or slow-growing plantations.
Step 3: Final Answer:
Both Plagiotropic and Cyclophysis responses can lead to abnormalities in clonal forestry.
In clonal forestry (propagation by cuttings), the behavior of the new plant depends on which part of the parent tree it was taken from. The question asks about undesirable responses.
Step 2: Detailed Explanation:
• Plagiotropic Response (B): This happens when a cutting taken from a horizontal side branch continues to grow horizontally or like a branch, even after it has rooted. It fails to form a straight vertical trunk. This is an "abnormality" for timber production.
• Cyclophysis (C): This is the effect of the "maturational age" of the parent tissue on the cutting. Cuttings from old trees may show reduced rooting and slow growth, appearing "physiologically old" from the start. This is often undesirable in commercial clones.
• Orthotropic Response (A): This is the "good" response, where the cutting grows vertically like a normal seedling. Cuttings from vertical leader shoots usually show this.
• Conclusion: Both Plagiotropism and mature Cyclophysis effects are major hurdles in clonal forestry, often resulting in deformed or slow-growing plantations.
Step 3: Final Answer:
Both Plagiotropic and Cyclophysis responses can lead to abnormalities in clonal forestry.
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