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For union between stock and scion in grafting which one is the first to occur?
- Formation of callus
- Production of plasmodesmata
- Differentiation of new vascular tissues
- Regeneration of cortex and epidermis
Correct answer: Formation of callus
Solution
In graft union, the first event is callus formation from the living cells near the cut surfaces. This callus bridges stock and scion and later allows vascular continuity and tissue differentiation.
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