Abstract
A cryopreservation protocol for Tabernaemontana divaricata suspension cell cultures (6 Div BW 101) was established. Cells were precultured in MS medium supplemented with 0.5 and 0.33 M mannitol for 2 or 3 days following with incubation in MS media with a mixture of 1 M sucrose, 0.5 M glycerol, 0.5 M DMSO, and 0.04 M L-proline as cryoprotectant in an ice bath for 20 min. The cells were transferred into 2 ml cryogenic vials and then, the vials were put into the cryogenic container prior to placing at a −80 °C freezer for 4 h followed by rapid immersion in liquid nitrogen. The cells were transferred without washing a MS medium solidified with 7% (w/v) agarose. Cells that were precultured 3 days after subculturing in MS medium supplemented with 0.5 M mannitol for 3 days, showed growth recovery. Metabolic profiling of control and cryopreserved Tabernaemontana divaricata cells was performed by 1H-NMR spectroscopy combined with PCA, GC, and HPLC. Differences of metabolic accumulation were found in the level of several amino acids, carbohydrates, and fumaric acid. However, the levels of the main alkaloid precursor tryptamine did not change.
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Abbreviations
- 2,4-D:
-
2,4 dichlorophenoxyacetic acid
- DMSO:
-
dimethyl sulfoxide
- GC:
-
gas chromatog- raphy
- HPLC:
-
high performance liquid chromatography
- MS:
-
Murashige & Skoog (1962)
- NMR:
-
nuclear magnetic resonance
- PCA:
-
principal component analysis
- TFA:
-
trifluoroacetic acid
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Suhartono, L., Van Iren, F., de Winter, W. et al. Metabolic comparison of cryopreserved and normal cells from Tabernaemontana divaricata suspension cultures. Plant Cell Tiss Organ Cult 83, 59–66 (2005). https://doi.org/10.1007/s11240-005-3869-8
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DOI: https://doi.org/10.1007/s11240-005-3869-8