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Cryopreservation and low-temperature storage of seeds of Phaius tankervilleae
Tomonari Hirano,Toshinari Godo,Kazumitsu Miyoshi,Keiko Ishikawa,Masaya Ishikawa,Masahiro Mii 한국식물생명공학회 2009 Plant biotechnology reports Vol.3 No.1
In this study we established reliable methods for conservation of seeds of Phaius tankervilleae as an orchid genetic resource. The seeds, which were dehydrated to 5% water content and preserved at 4C, showed no decrease in viability and germinability after three months. After storage for six months, however, the seeds showed a drastic decrease in germinability, even though survival rate was high. For long-term preservation of seeds of P. tankervilleae, cryopreservation is applied to the freshly harvested seeds. When the seeds were cryopreserved by the vitrification method for up to 12 months there was no apparent deterioration effect of storage time. These results indicate that cryopreservation by the vitrification method is useful for long-term conservation of P. tankervilleae seeds, which are difficult to preserve for more than three months under dry and low-temperature conditions. In this study we established reliable methods for conservation of seeds of Phaius tankervilleae as an orchid genetic resource. The seeds, which were dehydrated to 5% water content and preserved at 4C, showed no decrease in viability and germinability after three months. After storage for six months, however, the seeds showed a drastic decrease in germinability, even though survival rate was high. For long-term preservation of seeds of P. tankervilleae, cryopreservation is applied to the freshly harvested seeds. When the seeds were cryopreserved by the vitrification method for up to 12 months there was no apparent deterioration effect of storage time. These results indicate that cryopreservation by the vitrification method is useful for long-term conservation of P. tankervilleae seeds, which are difficult to preserve for more than three months under dry and low-temperature conditions.