Abstract
We have developed a system for the in vitro regeneration of pasqueflowers (Pulsatilla koreana Nakai). The system was based on somatic embryogenesis and shoot organogenesis. Over a growth period of 6 weeks, multiple shoots were initiated from leaf, petiole, and pedicel explants on Murashige and Skoog (MS) medium containing 0.5 mg l−1 indole-3-acetic acid (IAA) and zeatin (Zn), kinetin (Kin), or 6-benzyladenine (BA). We achieved 100% of adventitious shoot induced when petiole and pedicel explants were cultured on MS, 0.5–2.0 mg l−1 Zn, and 0.5 mg l−1 IAA. Somatic embryos developed from the explants and generated shoots on MS medium containing 0.25 mg l−1 Zn and 0.5 mg l−1 IAA. Globular and heart-shaped stages of somatic embryos were observed. Histological studies have revealed the stages of development of somatic embryos. For propagation and growth, the regenerated shoots from organogenic or embryogenic calluses were transferred to MS medium containing either (1) 1.5 mg l−1 Zn and 0.05 mg l−1 IAA or (2) 1.0 mg l−1 BA and 0.05 mg l−1 IAA. After the length of the shoots reached 3 cm, the shoots initiated by organogenesis as well as those initiated by somatic embryogenesis were transferred to the root induction medium. After 2 months of culture in half-strength MS with 1.5 mg l−1 α-naphthalene acetic acid (NAA), the rooting ratio was 93%. Finally, the rooted plantlets were acclimatized in a mixture of mountain soil and perlite.
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Abbreviations
- Kin:
-
Kinetin
- Zn:
-
Zeatin
- BA:
-
6-Benzyladenine
- IAA:
-
Indole-3-acetic acid
- NAA:
-
2-Naphthaleneacetic acid
- 2,4-D:
-
2,4-Dichlorophenoxi-acetic acid
- MS:
-
Murashige and Skoog (1962)
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Lin, GZ., Zhao, XM., Hong, SK. et al. Somatic embryogenesis and shoot organogenesis in the medicinal plant Pulsatilla koreana Nakai. Plant Cell Tiss Organ Cult 106, 93–103 (2011). https://doi.org/10.1007/s11240-010-9897-z
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DOI: https://doi.org/10.1007/s11240-010-9897-z