Rhizome:

Rhizomes are thick, horizontal, stout underground stems. They are swollen with the storage of food stuffs. They contain nodes and internodes. The nodes contain brown scaly leaves that protect the axillary buds. Nodes bear adventitious roots on the lower side. At onset of favorable situation the axillary and terminal buds grow into aerial shoots. Such aerial shoots die on the approach of unfavorable situation. Example: Ginger, Turmeric etc.

Advantages of Rhizomes:

Rhizomes are excellent means of perennation. They aid to tide over the unfavorable conditions such as drought and so on. They serve as store houses of food that is safely protected from the grazing of cattle. As aerial shoots occur from the buds of the rhizome they are helpful in vegetative propagation too.

Figure: Rhizome

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