Question:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In monocot plants Grafting is difficult with low percentage of takes as compared to dicots.
Reason R: Monocots have vascular bundle scattered throughout the stem as compared to dicots.
In light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In monocot plants Grafting is difficult with low percentage of takes as compared to dicots.
Reason R: Monocots have vascular bundle scattered throughout the stem as compared to dicots.
In light of the above statements, choose the correct answer from the options given below
Assertion A: In monocot plants Grafting is difficult with low percentage of takes as compared to dicots.
Reason R: Monocots have vascular bundle scattered throughout the stem as compared to dicots.
In light of the above statements, choose the correct answer from the options given below
Show Hint
"No Cambium = No Grafting." Dicots have a ring-shaped active cambium layer, whereas monocots have closed, scattered vascular bundles without any cambium, making standard grafting unsuccessful in monocots.
Updated On: Aug 7, 2026
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT the correct explanation of A
- A is true but R is false
- A is false but R is true
Show Solution
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Grafting is a vegetative propagation technique where the scion (upper shoot) and rootstock (lower root system) are joined to grow as a single plant.
A successful graft union depends entirely on the alignment and subsequent fusion of cambial cells to establish a functional vascular connection (xylem and phloem).
Step 2: Detailed Explanation:
Assertion A Analysis: Grafting in monocotyledonous plants is historically extremely difficult, rarely successful, and has a very low percentage of success compared to dicotyledonous plants. Thus, Assertion A is true.
Reason R Analysis: In dicots, vascular bundles are arranged in a neat ring with a continuous layer of active cambium.
During grafting, this cambial ring of the scion is aligned with that of the rootstock, facilitating quick callus formation and vascular bridging.
In contrast, monocots lack a continuous vascular cambium.
Their vascular bundles are closed (lacking cambium) and are scattered throughout the ground tissue (parenchyma) of the stem.
Because there is no distinct cambial ring to align, establishing a vascular bridge between the scion and rootstock is nearly impossible.
This structural difference explains why grafting is highly difficult in monocots. Thus, Reason R is true and is the correct explanation of A.
Step 3: Final Answer:
Since both statements are true and R perfectly explains A, the correct option is (A).
Grafting is a vegetative propagation technique where the scion (upper shoot) and rootstock (lower root system) are joined to grow as a single plant.
A successful graft union depends entirely on the alignment and subsequent fusion of cambial cells to establish a functional vascular connection (xylem and phloem).
Step 2: Detailed Explanation:
Assertion A Analysis: Grafting in monocotyledonous plants is historically extremely difficult, rarely successful, and has a very low percentage of success compared to dicotyledonous plants. Thus, Assertion A is true.
Reason R Analysis: In dicots, vascular bundles are arranged in a neat ring with a continuous layer of active cambium.
During grafting, this cambial ring of the scion is aligned with that of the rootstock, facilitating quick callus formation and vascular bridging.
In contrast, monocots lack a continuous vascular cambium.
Their vascular bundles are closed (lacking cambium) and are scattered throughout the ground tissue (parenchyma) of the stem.
Because there is no distinct cambial ring to align, establishing a vascular bridge between the scion and rootstock is nearly impossible.
This structural difference explains why grafting is highly difficult in monocots. Thus, Reason R is true and is the correct explanation of A.
Step 3: Final Answer:
Since both statements are true and R perfectly explains A, the correct option is (A).
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