Which process takes precedence in grafting when it comes to the union between the stock and scion?
Initiation of callus formation
Establishment of plasmodesmata
Differentiation of novel vascular tissues
Regrowth of cortex and epidermis
When it comes to the union between the stock and scion in grafting, the process that takes part in this the initiation of callus formation. Callus formation is the first step in graft union, where undifferentiated cells proliferate and form a mass of tissue at the interface between the stock and scion. This callus tissue eventually develops into a bridge that connects the vascular tissues of the stock and scion, allowing nutrient and water transport between them. Therefore, option 1 accurately represents the initial process that occurs in grafting.