Root stock helps in vegetative propagation of 

Vegetative propagation involves the use of vegetative structures especially vegetative buds. These structures are subjected to rooting and shoot formation, so that they can be separately planted. Modified food storing part have also been used for vegetative propagation. These structures can be underground modified stem (tuber, rhizome, corm, bulb) or subaerial modified stem (sucker, runner, offset stolon) or aerial modified stem (phylloclade, cladode, bulbils). Horizontal rhizome of ginger and vertical rhizome of Alocasia are commonly used for vegetative propagation.