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How are cultured shoot tips used to produce disease-free 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.
Cultured shoot tips are used to produce disease-free plants by leveraging the fact that the rapidly dividing cells at the very tip of a plant's shoot often outgrow the spread of systemic viruses.1
The process involves the following steps:
- Excision: A few cells from the growing shoot tip are carefully removed from the parent plant.1
- Sterile Cultivation: These cells are grown under strictly sterile conditions in tissue culture, using specialized media that provide necessary nutrients, vitamins, and growth regulators.213
- Development: Because the original tip tissue is typically free of the virus, the resulting plantlets that develop from these cells are also virus-free.1
This technique is particularly valuable for propagating healthy stocks of plants such as carnations, chrysanthemums, and potatoes, ensuring that the new generation is not infected with the diseases present in the parent plant.1