Question

what is sion and stock

Answer 1

Both of those terms are related to grafting, which is basically a way of producing plants by merging the cells of one species onto the other. The scion is the stem part of the plant which is to be grafted and the stock is the part of the other plant onto which the scion is to be merged. The scion and stock are usually tied together and the tissues combine, forming a hybrid variety.

Answer 2

when we practice grafting...
the plant which provide shoot system is called scion
and the one which provides root system is called stock
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