Question:
Which of the following grafting can be used in tomato if scion and rootstocks are of different thickness?
Which of the following grafting can be used in tomato if scion and rootstocks are of different thickness?
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Remember: "Splice" and "Tube" grafting require perfectly matching stem diameters to fit inside the securing clips. "Cleft" grafting is highly forgiving of diameter differences because the scion wedge is inserted into a split rootstock.
Updated On: Jul 23, 2026
- Cleft grafting
- Splice grafting
- Tube grafting
- Tongue Approach grafting
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Vegetable grafting is widely used in tomato production to manage soil-borne diseases (such as bacterial wilt and fusarium wilt) and improve environmental stress tolerance.
Choosing the appropriate grafting method depends on the growth stage, stem diameters, and anatomical compatibility of the scion and rootstock.
Step 2: Detailed Explanation:
Let us evaluate the compatibility and requirements of each grafting technique:
- Cleft Grafting: In this method, the rootstock stem is cut horizontally, and a vertical slit (cleft) is made down the center of the stem.
The scion base is cut into a wedge (V-shape) and inserted into this cleft.
Because the scion is inserted inside the split stem of the rootstock, the two stems do not need to be of identical thickness.
Even if the rootstock is thicker than the scion, aligning the cambium layer on at least one side ensures a successful vascular union, making cleft grafting highly versatile.
- Splice Grafting Tube Grafting: These techniques require making matching diagonal cuts on both the scion and rootstock.
They are held together using a small plastic sleeve or clip.
Because they rely on a flush face-to-face contact of the cut stems inside a fixed-diameter tube, they require the scion and rootstock to have identical diameters.
- Tongue Approach Grafting: Requires both plants to be grown close together while still on their own roots, making it labor-intensive and less suitable for mismatched commercial plug seedlings.
Therefore, Cleft grafting is the preferred method when scion and rootstock stem thicknesses differ.
Step 3: Final Answer:
The grafting method used in tomato when the scion and rootstock have different stem thicknesses is Cleft grafting.
Vegetable grafting is widely used in tomato production to manage soil-borne diseases (such as bacterial wilt and fusarium wilt) and improve environmental stress tolerance.
Choosing the appropriate grafting method depends on the growth stage, stem diameters, and anatomical compatibility of the scion and rootstock.
Step 2: Detailed Explanation:
Let us evaluate the compatibility and requirements of each grafting technique:
- Cleft Grafting: In this method, the rootstock stem is cut horizontally, and a vertical slit (cleft) is made down the center of the stem.
The scion base is cut into a wedge (V-shape) and inserted into this cleft.
Because the scion is inserted inside the split stem of the rootstock, the two stems do not need to be of identical thickness.
Even if the rootstock is thicker than the scion, aligning the cambium layer on at least one side ensures a successful vascular union, making cleft grafting highly versatile.
- Splice Grafting Tube Grafting: These techniques require making matching diagonal cuts on both the scion and rootstock.
They are held together using a small plastic sleeve or clip.
Because they rely on a flush face-to-face contact of the cut stems inside a fixed-diameter tube, they require the scion and rootstock to have identical diameters.
- Tongue Approach Grafting: Requires both plants to be grown close together while still on their own roots, making it labor-intensive and less suitable for mismatched commercial plug seedlings.
Therefore, Cleft grafting is the preferred method when scion and rootstock stem thicknesses differ.
Step 3: Final Answer:
The grafting method used in tomato when the scion and rootstock have different stem thicknesses is Cleft grafting.
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