Answer:
The culture medium used for the propagation of an explant in vitro contains nutrients like inorganic salts, vitamins, 2-4% sucrose, amino acid glycine and growth regulators like auxin and cytokinin with or without the use of yeast extract or coconut milk or banana pulp. The culture medium can be kept liquid, made semisolid with gelatin or solidified with agar. These nutrients are required by the explant for growth and development.
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