Abstract
A protocol for in vitro propagation was developed for Viola pilosa, a plant of immense medicinal value. To start with in vitro propagation, the sterilized explants (buds) were cultured on MS basal medium supplemented with various concentrations of growth regulators. One of the medium compositions MS basal + 0.5 mg/l BA + 0.5 mg/l TDZ + 0.5 mg/l GA3 gave best results for in vitro shoot bud establishment. Although the problem of shoot vitrification occurred on this medium but this was overcome by transferring the vitrified shoots on MS medium supplemented with 1 mg/l BA and 0.25 mg/l Kn. The same medium was found to be the best medium for further in vitro shoot multiplication. 100 % root induction from in vitro grown shoots was obtained on half strength MS medium supplemented with 1 mg/l IBA. In vitro formed plantlets were hardened and transferred to soil with 83 % survival. Additionally, conservation of in vitro multiplying shoots was also attempted using two different approaches namely slowing down the growth at low temperature and cryopreservation following vitrification. At low temperature retrieval rate was better at 10 °C than at 4 °C after conservation of in vitro multiplying shoots. In cryopreservation–vitrification studies, the vitrified shoot buds gave maximum retrieval of 41.66 % when they were precooled at 4 °C, while only 16.66 % vitrified shoots were retrieved from those precooled at 10 °C. Genetic stability of the in vitro grown plants was analysed by RAPD and ISSR markers which indicated no somaclonal variation among in vitro grown plants demonstrating the feasibility of using the protocol without any adverse genetical effects.
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Abbreviations
- BA or BAP:
-
6-benzyladenine or 6-benzyladenine amino purine
- TDZ:
-
Thidiazuron
- GA3 :
-
Gibberellic acid
- IBA:
-
Indole-3-butyric acid
- Kn:
-
Kinetin
- DMSO:
-
Dimethyl sulfoxide
- RAPD:
-
Randomly amplified polymorphic DNA
- ISSR:
-
Inter simple sequence repeat
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Soni, M., Kaur, R. Rapid in vitro propagation, conservation and analysis of genetic stability of Viola pilosa . Physiol Mol Biol Plants 20, 95–101 (2014). https://doi.org/10.1007/s12298-013-0200-8
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DOI: https://doi.org/10.1007/s12298-013-0200-8