Abstract
We describe an efficient process for regeneration of Taxus wallichiana plants via shoot organogenesis from callus cultures derived from zygotic embryos. Zygotic embryos cultured on half strength Lloyd and McCown's basal medium supplemented with SH vitamin (½ WPMSH), 0.5 mg l−1 6-benzyladenine (BA) in combination with 1.0–2.0 mg l−1 2,4-dichlorophenoxyacetic acid (2,4-D) or α-Napthaleneacetic acid (NAA) produced two morphologically distinct types of calli-compact, green callus (CG) and compact, yellow (CY) callus after 4 weeks of culture. Optimum frequency (63%) of adventitious shoot bud induction was achieved in CG callus (3.0±0.67 shoot buds per gram of CG callus) when cultured on ½ WPMSH basal medium supplemented with 2.5 mg l−1 BA after 4 weeks. The inclusion of 1% activated charcoal (AC) to ½ WPMSH basal medium (shoot elongation medium) led to maximum shoot elongation (2.15 cms). Microshoots rooted in high frequency (40%) in MS basal medium in which the concentration of nitrates was reduced to one-fifth the normal concentration after 4 months of culture.
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Abbreviations
- BA:
-
6-Benzyladenine
- 2,4-D:
-
2,4-Dichlorophenoxyacetic acid
- NAA:
-
α-Napthaleneacetic acid
- AC:
-
Activated charcoal
- CG:
-
Compact, green callus
- CY:
-
Compact, yellow callus
- FC:
-
Friable, creamish callus
- IBA:
-
Indole-3-butyric acid
- IAA:
-
Indole-3-acetic acid
- Kn:
-
Kinetin
- 2iP:
-
2-Isopentyladenine
- TDZ:
-
Thidiazuron
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Acknowledgement
Financial assistance from Indo-French Centre for the Promotion of Advanced Research (Centre Franco-Indien pour la Promotion de la Recherche Avancée) is gratefully acknowledged (Project 2503-2).
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Communicated by G.C. Phillips
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Datta, M.M., Majumder, A. & Jha, S. Organogenesis and plant regeneration in Taxus wallichiana (Zucc.). Plant Cell Rep 25, 11–18 (2006). https://doi.org/10.1007/s00299-005-0027-z
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DOI: https://doi.org/10.1007/s00299-005-0027-z