Abstract
The physiological effects of three auxins [indole-3-butyric acid (IBA), α-naphthaleneacetic acid (NAA) and 2,4-dichlorophenoxyacetic acid (2,4-d)] and two cytokinins [thidiazuron (TDZ) and N6-benzylaminopurine (NAA)] on in vitro morphogenesis of Doryanthes excelsa were measured. Longitudinal bud sections derived from immature inflorescences were used as a source of explants. Callus regeneration was observed at the highest frequencies (46.2%) when grown on media containing 50 μmol L-1 NAA and 0.5 μmol L−1 TDZ. Adventitious shoot organogenesis was observed at the highest frequency (56.8%) when grown on media containing 0.5 μmol L−1 NAA and 50 μmol L−1 TDZ. Regenerated shoots were rooted ex vitro after 6 weeks when dipped in a solution of 50 μmol L−1 NAA or no plant growth regulators were applied.
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Abbreviations
- 2,4-d :
-
2,4-dichlorophenoxyacetic acid
- BA:
-
N6-benzylaminopurine
- IBA:
-
Indole−3-butyric acid
- MES:
-
n-morpholinoethanesulfonic acid
- MS:
-
Murashige and Skoog (1962) medium
- NAA:
-
α-naphthaleneacetic acid
- TDZ:
-
Thidiazuron [1-phenyl-3-(1,2,3-thiadiazol-5-yl) urea]
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Acknowledgements
A. M. Dimech wishes to thank Mr. Greg Miles of Princeton Nurseries (Mount White, NSW, Australia) for his generous assistance. This research was jointly funded by the Rural Industries Research and Development Corporation and the Commonwealth Government of Australia through an Australian Postgraduate Award.
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Dimech, A.M., Cross, R., Ford, R. et al. Micropropagation of Gymea Lily (Doryanthes excelsa Corrêa) from New South Wales, Australia. Plant Cell Tiss Organ Cult 88, 157–165 (2007). https://doi.org/10.1007/s11240-006-9184-1
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DOI: https://doi.org/10.1007/s11240-006-9184-1