**5. Biotechnology**

Orchids have a unique structure that induces from explants in vitro, namely protocorm-like bodies (PLBs) that resemble or equate to somatic embryos. Cardoso et al. provided an overview of PLBs in aspects of biotechnology and molecular biology [11]. Commonly, orchid PLBs are adequate materials for studying developmental biology and breeding techniques. In this review, they suggested that techniques using induction, proliferation, and regeneration of PLBs could be applied in the commercial mass propagation of orchids in the future.
