@article{oai:iwate-u.repo.nii.ac.jp:00009354,
 author = {河村, 幸男 and 金子, 智志 and 山崎, 誠和 and 小林, 紫苑 and 上村, 松生},
 issue = {1},
 journal = {低温生物工学会誌},
 month = {Apr},
 note = {Freezing tolerance is one of the most important characteristics for plants living at subzero temperatures in winter. When ice crystals form and grow in the extracellular spaces they may bring cells, especially cell surface, to the dehydration and mechanical stresses. Many physiological studies have supported the hypothesis that the enhancement of freezing tolerance in plants during cold acclimation is closely associated with an increase in the cryostability of plasma membrane. In Arabidopsis, many of the plasma membrane proteins including dehydrins, lipocalin and synaptotagmin increase during cold acclimation. Although there was little information about the freeze-induced mechanical stress tolerance, we have revealed that the extracellular calcium increases the tolerance to freeze-induced mechanical stress, the mechanism of which is involved in the membrane resealing via plant synaptotagmin, SYT1. Recently, besides Arabidopsis, we confirmed the calcium-dependent freezing tolerance in three monocot and one dicot. In addition, freezing tolerance tests of three monocots in the presence of anti-SYT1 antibody demonstrated that the calcium-dependent freezing tolerance results in the membrane repair. Finally, our results support the idea that the calcium-dependent membrane repair is a common mechanism of freeze-induced mechanical stress tolerances for many angiosperms., 地球上の生物が“生き物らしい”活動を行うためには，水が液体であることが必須であり，水が個体になる，すなわち凍ると，成長や生殖などの一般的な生命活動ができないだけでなく，“耐える”ためのメカニズムがないと存在も危うくなる．本論考では，簡単に凍結傷害および凍結耐性について考察した後，近年，我々の研究室で分かりつつある凍結機械的ストレス耐性メカニズムについて述べる．},
 pages = {53--57},
 title = {水から氷へ:凍結傷害発生と回避},
 volume = {58},
 year = {2012}
}