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How does callus tissue culture produce whole plants?

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tissue culture Tissue culture often requires sterile working conditions and thus is typically performed in a laminar flow cabinet (or tissue culture hood), which circulates filtered air to reduce the risk of culture contamination.

Callus tissue culture produces whole plants through a specialized process of tissue culture that relies on the ability of callus cells to undergo organ differentiation.1

A callus is a mass of undifferentiated cells that can be induced to organize into specific plant structures. The transformation of this tissue into a complete organism involves the following steps:21

Growth and Induction: The callus is grown in a controlled environment using aseptic techniques and specialized media containing essential nutrients, vitamins, and growth regulators.1
Organ Differentiation: By manipulating the balance of plant hormones, researchers can direct the development of the callus. Specifically, high levels of auxin relative to cytokinin promote root development, while low auxin and high cytokinin conditions encourage the growth of stems and leaves.13
Regeneration: As these cells organize into growing points, they eventually give rise to roots, stems, and leaves, effectively regenerating an entire plant.2

While this technique has been successful with plants such as tobacco, asparagus, and carrots, it is primarily used in research rather than as a standard method for commercial propagation due to the risk of genetic variability.1