Question:
In case of epicotyl grafting in mango, healing union stage extends from
In case of epicotyl grafting in mango, healing union stage extends from
Show Hint
Graft healing in woody plants like mango is a gradual process. A strong union needs not just callus, but also new, functional vascular connections between scion and rootstock. This typically takes several months for the plant to be considered well-established.
Updated On: Jul 2, 2026
- 30-60 days
- 60-120 days
- 120-180 days
- 180-200 days
Show Solution
Verified By Collegedunia
The Correct Option is C
Approach Solution - 1
Epicotyl grafting (or stone grafting) in mango involves joining a scion (shoot part) to a young rootstock. The "healing union stage" refers to the period required for the graft to successfully take and form a strong, lasting connection. This involves several key steps:
Callus Formation: Cells at the cut surfaces of both scion and rootstock multiply to form a mass of undifferentiated cells called callus. This bridges the gap between them.
Vascular Differentiation: New vascular tissues (xylem and phloem) must develop within the callus, connecting the vascular systems of the scion and rootstock. This is crucial for water and nutrient transport. While initial callus formation starts within weeks, the development of a robust and fully healed vascular union that makes the plant strong enough for transplanting and continued growth takes longer in woody plants like mango.
30-60 days: Callus formation is underway, but the union is still fragile.
60-120 days: Significant healing occurs, and vascular connections improve. However, the union may not be fully mature and strong.
120-180 days (approx. 4-6 months): This timeframe typically allows for the development of a well-established, strong, and sufficiently healed graft union, making the young mango plant hardy for further handling and growth.
180-200 days: While healing processes can continue, the primary strong union required for survivability and vigor is usually established before this extended period. Therefore, the 120-180 day range is considered appropriate for the graft healing union stage to be substantially complete for successful propagation. 120-180 days
Callus Formation: Cells at the cut surfaces of both scion and rootstock multiply to form a mass of undifferentiated cells called callus. This bridges the gap between them.
Vascular Differentiation: New vascular tissues (xylem and phloem) must develop within the callus, connecting the vascular systems of the scion and rootstock. This is crucial for water and nutrient transport. While initial callus formation starts within weeks, the development of a robust and fully healed vascular union that makes the plant strong enough for transplanting and continued growth takes longer in woody plants like mango.
30-60 days: Callus formation is underway, but the union is still fragile.
60-120 days: Significant healing occurs, and vascular connections improve. However, the union may not be fully mature and strong.
120-180 days (approx. 4-6 months): This timeframe typically allows for the development of a well-established, strong, and sufficiently healed graft union, making the young mango plant hardy for further handling and growth.
180-200 days: While healing processes can continue, the primary strong union required for survivability and vigor is usually established before this extended period. Therefore, the 120-180 day range is considered appropriate for the graft healing union stage to be substantially complete for successful propagation. 120-180 days
Was this answer helpful?
0
0
Show Solution
Verified By Collegedunia
Approach Solution -2
Direct recall approach:
Nursery references on epicotyl (stone) grafting in mango generally describe three broad phases after grafting: an early risk phase of the first one to two months when graft failure is most likely, a middle phase of active callus and vascular bridge formation, and a final "healing union stage" in which the joint becomes strong enough to withstand handling and transplanting. This consolidation is typically complete within four to six months of grafting, that is, a 120-180 day window. Nurseries generally hold grafted plants for around this period before field planting, which is why 120-180 days is the recognised duration, rather than the shorter windows that are still fragile or the longer windows beyond what is normally required.
Nursery references on epicotyl (stone) grafting in mango generally describe three broad phases after grafting: an early risk phase of the first one to two months when graft failure is most likely, a middle phase of active callus and vascular bridge formation, and a final "healing union stage" in which the joint becomes strong enough to withstand handling and transplanting. This consolidation is typically complete within four to six months of grafting, that is, a 120-180 day window. Nurseries generally hold grafted plants for around this period before field planting, which is why 120-180 days is the recognised duration, rather than the shorter windows that are still fragile or the longer windows beyond what is normally required.
Was this answer helpful?
0
0
Top ICAR AIEEA Horticulture Questions
- In banana:
Statement (A): Bunch feeding is a simple and low-cost method.
Statement (B): It is the direct way to supply nutrients to the bunch.
Statement (C): Only micronutrients can be given through this method.
Choose the correct answer from the options given below. - The softwood grafting
Statement (I): Is done with mature, procured scion on the emerging soft, coppery-red shoot of the rootstock, which is 60-70 days old.
Statement (II): Is used for raising desired varieties of mango, sapota, tamarind and cashew.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): In garlic modified roots are economic part.
Statement (II): Characteristic odour in garlic is due to volatile organic sulfur-containing compounds that are rapidly produced upon tissue damage and diffuse into the air.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The flowers of ridge gourd start opening in the evening and remain open throughout the night.
Statement (II): Pollination of ridge gourd is done in the day time.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The first gynoecious based hybrid of bitter gourd is Pusa Hybrid-4 developed by ICAR-IARI, New Delhi.
Statement (II): The male:female ratio of the gynoecious based hybrids of bitter gourd is 25:1.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Plant Propagation Questions
- The softwood grafting
Statement (I): Is done with mature, procured scion on the emerging soft, coppery-red shoot of the rootstock, which is 60-70 days old.
Statement (II): Is used for raising desired varieties of mango, sapota, tamarind and cashew.
In light of the above statements, choose the most appropriate answer from the options given below. - Which method of grafting is used for reworking old fruit tree?
- Citrus rootstock which is tolerant to gummosis, root rot, tristeza and drought
- Which of the following is true for essentiality of germination?
(A). Viability of seed
(B). Proper environment
(C). Seed free from dormancy
(D). Thin seed coat
Choose the correct answer from the options given below: - In case of epicotyl grafting in mango, healing union stage extends from
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions