**3. Conclusion**

The cryopreservation technique for plant genetic resources has developed since the 1990s. However, since there are plant species which cannot yet be cryopreserved, improvement of the technology is a pressing need. I have limited my remarks to the introduction of the cryopreservation technique in this section. This seems like a personal comment, not a part of your conclusion. Kartha (1985), in his detailed book on these principles, provides a valuable addition to this chapter, not but provides an explanation of cryopreservation technology.
