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In vitro propagation of Paphiopedilum orchid through formation of protocorm-like bodies

  • Chyuam-Yih Ng
  • Norihan Mohd. SalehEmail author
Original Paper

Abstract

Paphiopedilum orchids are among the world’s most popular orchid due to their impressively beautiful flowers. Propagation of these orchid genera has been hampered by the naturally slow growth rate of the plant, which renders it very difficult to be propagated through conventional methods. In vitro culture techniques have provided a useful alternative technology for propagating this recalcitrant species. In this study, the propagation of P. rothschildianum was achieved through the in vitro formation of secondary protocorm-like bodies (PLBs) from the primary PLB that developed from stem-derived callus. The PLBs were cultured on half-strength MS medium supplemented with different concentrations (1.0, 2.0, 3.0, and 4.0 μM) of 6-benzyladenine (BA) and kinetin for the induction of secondary PLBs. The highest number of secondary PLBs formed was obtained on half-strength MS medium supplemented with 4.0 μM kinetin, with an average of 4.1 PLBs per explant after 8 weeks of culture. The secondary PLBs continued to proliferate further and formed 9.5–12.1 new PLBs per secondary PLB after being subcultured onto half-strength plant growth regulator-free MS medium supplemented with 60 g/L banana homogenate (BH). These tertiary PLBs were subcultured onto media containing different organic additives, such as BH, coconut water, potato homogenate, and tomato homogenate, for plantlet regeneration. Among the organic additives tested, the addition of 20% CW to half-strength MS medium resulted in the best average plantlet regeneration percentage from the PLBs, 67.9%, after 8 weeks of culture.

Keywords

6-benzyladenine Kinetin Micropropagation Organic additive Plantlet regeneration Slipper orchid 

Abbreviations

BA

6-Benzyladenine

BH

Banana homogenate

CW

Coconut water

2,4-D

2,4-Dichlorophenoxyacetic acid

NAA

1-Naphthaleneacetic acid

PGR

Plant growth regulator

PH

Potato homogenate

PLB

Protocorm-like body

TDZ

Thidiazuron

TH

Tomato homogenate

Notes

Acknowledgments

The authors thank the School of Graduate Studies of University Putra Malaysia for providing a Graduate Research Fellowship to the first author.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular SciencesUniversiti Putra MalaysiaSerdangMalaysia

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