Abstract
The ability to germinate orchids from seeds in vitro presents a useful and viable method for the propagation of valuable germplasm, maintaining the genetic heterogeneity inherent in seeds. Given the ornamental and medicinal importance of many species within the genus Dendrobium, this review explores in vitro techniques for their asymbiotic seed germination. The influence of abiotic factors (such as temperature and light), methods of sterilization, composition of basal media, and supplementation with organic additives and plant growth regulators are discussed in context to achieve successful seed germination, protocorm formation, and further seedling growth and development. This review provides both a basis for the selection of optimal conditions, and a platform for the discovery of better ones, that would allow the development of new protocols and the exploration of new hypotheses for germination and conservation of Dendrobium seeds and seedlings.
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Abbreviations
- 2-iP:
-
2-Isopentenyladenine
- AC:
-
Activated charcoal
- AH:
-
Apple homogenate
- BA:
-
N6-Benzyladenine
- BP:
-
Banana pulp/paste
- CW:
-
Coconut water
- GA3 :
-
Gibberellic acid
- NAA:
-
α-Naphthaleneacetic acid
- IAA:
-
Indole-3-acetic acid
- IBA:
-
Indole-3-butyric acid
- Kin:
-
Kinetin
- OMF:
-
Orchid mycorrhizal fungi
- PGR:
-
Plant growth regulator
- PPFD:
-
Photosynthetic photon flux density
- TDZ:
-
Thidiazuron (N-phenyl-N′-1,2,3-thiadiazol-5-ylurea)
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The authors thank Dr. Meesawat Upatham (Prince of Songkla University, Thailand) for comments and opinions on an earlier version of the manuscript.
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Teixeira da Silva, J.A., Tsavkelova, E.A., Ng, T.B. et al. Asymbiotic in vitro seed propagation of Dendrobium . Plant Cell Rep 34, 1685–1706 (2015). https://doi.org/10.1007/s00299-015-1829-2
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DOI: https://doi.org/10.1007/s00299-015-1829-2