Abstract
The polyamine (PA) content of in vitro-grown explants of Thymus moroderi Pau ex Martínez has been evaluated during minimal growth storage. The growth restriction was imposed by the combined action of osmotically-active compounds (15 g dm−3 sucrose and 15 g dm−3 mannitol) present in the Murashige and Skoog medium and the modification of the physical environment of the culture (4 °C and darkness). In these conditions, cultures were maintained up to 29 weeks without subculture. During this storage period, we analyzed contents of free, perchloric acid (PCA)-soluble and PCA-insoluble conjugated PA. Minimal growth storage brought about an increase in free putrescine (Put) coinciding with a reduction in PCA-soluble conjugated Put occurring during the first weeks of storage. PCA-insoluble conjugated spermidine (Spd) also accumulated in response to storage.
Abbreviations
- Cad:
-
cadaverine
- Dap:
-
diaminopropane
- FMOC:
-
N-9-fluorenylmethylchloroformiate
- MS:
-
Murashige and Skoog
- PA:
-
polyamine
- PCA:
-
perchloric acid
- Put:
-
putrescine
- Spd:
-
spermidine
- Spm:
-
spermine
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Acknowledgement: A.M.M. was financially supported by a pre-doctoral fellowship from the Spanish Ministry of Science and Innovation.
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Marco-Medina, A., Casas, J.L. Polyamine content during minimal growth storage of Thymus moroderi explants. Biol Plant 56, 590–594 (2012). https://doi.org/10.1007/s10535-012-0061-y
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DOI: https://doi.org/10.1007/s10535-012-0061-y