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Genetic and biochemical analysis of Hypericum perforatum L. plants regenerated after cryopreservation

  • Genetics and Genomics
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Abstract

Shoot-tips from in vitro cultured Hypericum perforatum L. genotypes were subjected to assessments of developmental competence, genetic stability, and biosynthetic ability to identify critical points during cryopreservation. Survival rate, chromosome number stability, alteration in VNTR sequences and hypericin content were evaluated, in plants after pre-culture, and two subsequent cryogenic steps (cryoprotection and cooling) and those recovered from cryopreserved meristems. Pre-culture and cryoprotection treatments, did not reveal any significant differences, in these studied characteristics. Genetic stability was assessed by chromosome counts and analysis of variability in the VNTR sequences. No changes in chromosome number were detected in comparison with the untreated control but minor alterations were revealed in non-coding sequences. The content of hypericin after the recovery of cryopreserved meristems remained comparable with the unfrozen control. The controlled rate freezing technique used for cryopreservation was relevant for restoration of genetic and biochemical stability in Hypericum perforatum L. shoot-tips.

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Abbreviations

ABA:

abscisic acid

BA:

6-benzylaminopurine

DMSO:

dimethyl sulfoxide

LN:

liquid nitrogen

SSR:

simple sequence repeats

VNTR:

variable number of tandem repeats

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Acknowledgements

This work was supported by grant APVT-20-003704 and VEGA 1/2326/05. Authors would like to thank Bc. Ľudmila Majsniarová, Mrs. Zdenka Lacková and Mrs. Alžbeta Maková for their technical assistance.

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Correspondence to Eva Čellárová.

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Communicated by K. Toriyama

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Urbanová, M., Košuth, J. & Čellárová, E. Genetic and biochemical analysis of Hypericum perforatum L. plants regenerated after cryopreservation. Plant Cell Rep 25, 140–147 (2006). https://doi.org/10.1007/s00299-005-0050-0

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  • DOI: https://doi.org/10.1007/s00299-005-0050-0

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