The root is used for food, spice, and medicine. The root is actually called a tuber. It has an orange color and is a member of the ginger family. It is good for digestion, is an antimicrobial, and also an antiinflammatory,
Turmeric root. Rhizome
The rhizome maggots affect turmeric in such a way that it normalizes blood sugar. It also reduces the possibility of Alzheimer's Disease.
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A horizontal underground plant stem with leaf shoots above and roots below is called a rhizome.
Rhizome
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The rhizome is a creeping underground stem of some plants. A rhizome is thick and swollen and acts as a food store. Iris is an example of a rhizomatous plant.
Ginger is a rhizome, Celery is not.
The banana plant can be grown through its rhizome with sprouts (false stem)
Arrowroot
Coptis is the underground stem (rhizome) or root of the plant Coptis chinensis.
The turmeric plant is sterile and does not produce seeds. They reproduce through rhizomes.