Several ornamental plants are at present propagated in vitro by direct shoot regeneration. Chief among these are plants of the family Gesneriaceae, (including Achimenes, Saintpaulia, Sinningia and Streptocarpus), where shoot buds can be freely regenerated directly on leaf explants without the formation of any intervening callus phase. Many other ornamentals and crop plants either are (or could be) propagated efficiently by this means, for example, begonias, Epiphyllum, cacti, Gerbera, Hosta and Lilium. Further examples are quoted in the tables of Volume 2. Remember that this technique is more prone to yield off-types than shoot and node cultures, and that the technology is not applicable for the propagation of chimeras.
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