Abstract

Thin cell layers (TCLs) offer a simple yet effective protocol that has contributed to major advances in clonal micropropagation of orchids. TLCs have been successfully used for protocorm-like body (PLB) and callus induction in Aranda, Coelogyne cristata, Cymbidium spp., Dendrobium spp., Doritaenopsis, Paphiopedilum, Renanthera, Rhynchostylis, Spathoglottis, and Xenikophyton. TCLs have also been a bulwark for genetic transformation studies of select genera. This review takes an in-depth look at how TCLs have been employed in orchid biotechnology and provides in-depth protocols that will allow for the generation of PLBs using TCLs. As PLBs in orchids are deemed somatic embryos, these will be useful for large-scale mass propagation in bioreactors or for long-term storage as synthetic seeds.

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