Antifreeze proteins and their role in plant antifreeze physiology

文献类型： 外文期刊

第一作者： Jiang, Y

作者： Jiang, Y;Jia, SR;Fei, YB;Tan, KH

作者机构：

关键词： antifreeze proteins;thermal hysteresis activity;antifreeze;supercooling;cold induction

期刊名称：ACTA BOTANICA SINICA （ 影响因子：0.599； ）

ISSN： 0577-7496

年卷期： 1999 年 41 卷 7 期

页码：

收录情况： SCI

摘要： In the last 3 decades, antifreeze proteins (AFPs) have been studied in overwintering insects, polar fish, then in plant materials. The studies in fish AFPs were more comprehensive and systematic. Four groups of AFPs are indentified in the polar fish: AFGPs (antifreeze glycoproteins), AFP I, AFP II and AFP III. Two new AFPs, THP26/27 tin Tenebrio molitor), DAFP-1/-2 tin Dendroides canadensis), are purified from insects. Recently, five AFPs in plants are purified: Sd67 tin Solanum dulcamara), three antifungal proteins (in Secale cereale) and afp (in Ammonpiptanthus mongolicus). Their THA (thermal hysteresis activity) is lower than that of fish and insect AFPs. Plant AFPs may have four functions in the antifreeze process of plant: (1) lowering the freezing point; (2) inhibiting ice-recrystallization; (3) modifying ice morphology; (4) regulating the supercooling state of protoplasm. And it is the last one that may be the key role of AFPs to beneficiate the plant undergoing an antifreeze physiological process.

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