Abstract
Ochna integerrima is a medicinal and ornamental plant in Southeastern Asia. It has been listed as a rare and endangered species in China. Here we studied the effects of plant growth regulators and their concentrations on the induction of somatic embryogenesis and shoot organogenesis from leaf and shoot explants of O. integerrima for the first time. Cytokinins played a crucial role in somatic embryogenesis and shoot organogenesis. Among them, a higher concentration of thidiazuron (10.0–15.0 μM TDZ) could induce both somatic embryogenesis and adventitious shoot formation whereas low concentrations of TDZ (5.0 μM) could only induce adventitious shoots. However, 6-benzyladenine (BA at 5–15 μM) could only induce adventitious shoots. Shoot explants induced more adventitious shoots and somatic embryos than leaf explants when cultured on medium with the same concentration (5–15 μM) of TDZ or 15 μM BA. Medium containing 0.5 μM α-naphthaleneacetic acid and 8 μM indole-3-butyric acid and 0.1% activated charcoal could induce adventitious roots within 1 month. An efficient mass propagation and regeneration system has been established.

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- 2,4-D:
-
2,4-dichloro-phenoxyacetic acid
- BA:
-
6-benzyladenine
- IBA:
-
Indole-3-butyric acid
- NAA:
-
α-naphthaleneacetic acid
- TDZ:
-
Thidiazuron
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Ma, G., Lü, J., da Silva, J.A.T. et al. Shoot organogenesis and somatic embryogenesis from leaf and shoot explants of Ochna integerrima (Lour). Plant Cell Tiss Organ Cult 104, 157–162 (2011). https://doi.org/10.1007/s11240-010-9812-7
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DOI: https://doi.org/10.1007/s11240-010-9812-7


