Abstract
Pedunculate oak (Quercus robur) is an ecologically and economically important forest tree species which produces seeds that are classified as recalcitrant. Thus, cryopreservation of seed meristems is a method for long-term preservation of this germplasm in gene banks. During cryopreservation, many factors, such as desiccation, cryoprotection and cooling/rewarming, can induce stress in the frozen meristems. In this study, in vitro survival and the global DNA methylation level of plumules after cryoprotection, desiccation and cryostorage was evaluated. Results indicated that both desiccation and storage in liquid nitrogen have negligible influence on DNA methylation status of Q. robur plumules. These findings support the cryopreservation of plumules as an appropriate method for conservation of Q. robur germplasm.
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Abbreviations
- MC:
-
Moisture content
- WC:
-
Water content
- m5C:
-
5-Methylcytosine
- C:
-
Cytosine
- T:
-
Thymine
- LN:
-
Liquid nitrogen
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Acknowledgments
We thank Mrs. Elżbieta Drzewiecka-Pieniężna, and Mrs. Magdalena Sobczak for providing technical assistance during the experiments in Kórnik. This work was partly supported by a grant from the National Science Center, Poland, Grant No. N N309 072036.
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Plitta, B.P., Michalak, M., Naskręt-Barciszewska, M.Z. et al. DNA methylation of Quercus robur L. plumules following cryo-pretreatment and cryopreservation. Plant Cell Tiss Organ Cult 117, 31–37 (2014). https://doi.org/10.1007/s11240-013-0417-9
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DOI: https://doi.org/10.1007/s11240-013-0417-9