Summary
Protoplasts of 10 cultivars of V. faba were isolated from etiolated shoot-tips and tested for their regeneration capacity. After purification, protoplasts were embedded in sodium alginate and cultivated in the medium of Kao and Michayluk (1975) containing 0.5 mg·1−1 of each 2,4-dichlorophenoxyacetic acid, naphthylacetic acid and 6-benzylaminopurine. Depending on cultivar, division frequencies of up to 40% were obtained. Six weeks after embedding, protoplast-derived calluses were transferred to Gelrite-solidified media with different combinations of growth regulators. A two step protocol (auxin high/low) was tested for its ability to induce somatic embryogenesis. The formation of globular structures was observed, but no embryo formation could be achieved. In contrast, cultivation of protocalluses on medium supplemented with thidiazuron resulted in shoot development in cultivar Mythos. To generate mature plants, the shoots were grafted onto young seedlings. In order to optimize the in vitro-conditions, different concentrations of thidiazuron alone or in combination with naphthylacetic acid were tested, showing that an increase of thidiazuron and the addition of naphthylacetic acid positively affects both the viability of protocalluses and the regeneration frequency.
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Abbreviations
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- BA:
-
5-benzylaminopurine
- GA3 :
-
gibberellic acid
- IBA:
-
indole-3-butyric acid
- Kin:
-
kinetin
- KM:
-
Kao and Michayluk
- MS:
-
Murashige and Skoog
- NAA:
-
naphthylacetic acid
- TDZ:
-
thidiazuron
- Zea:
-
zeatin
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Tegeder, M., Gebhardt, D., Schieder, O. et al. Thidiazuron-induced plant regeneration from protoplasts of Vicia faba cv. Mythos. Plant Cell Reports 15, 164–169 (1995). https://doi.org/10.1007/BF00193712
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DOI: https://doi.org/10.1007/BF00193712