1. The United Graduate School of Agricultural Sciences, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan.
2. Cryobiofrontier Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan.
3. Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan.