不同类型脱水素在植物低温胁迫应答中的作用

Roles of Different Dehydrins on Low Temperature Response in Plants

低温是影响植物生长发育和作物产量的非生物胁迫因子之一。植物在长期的进化过程中,通过调节自身的生理及分子变化,形成了对低温胁迫的适应能力。脱水素是一类晚期胚胎丰富蛋白,可保护植物细胞内蛋白质和膜结构等不被低温破坏。不同植物中脱水素的过量表达能够提高植物的低温抗性,植物脱水素的表达和蛋白质的积累与植物耐低温能力密切相关。本文对SKn、Kn、YnSKn、KnS和Yn Kn型脱水素在植物抵御低温胁迫过程中的作用进行综述,旨在为进一步利用脱水素进行植物抗低温分子育种研究提供参考。

Low temperature is one of the major abiotic stress factors that affect plant growth and development as well as crop productivity. Plants have evolved the ability to adapt low temperature stress by regulating their physiological and molecular changes during the process of long-term evolution. Dehydrins is a kind of late embryogenesis abundant proteins, which can protect the protein and membrane structure in the plant cells against unfavorable changes caused by low temperature. It is demonstrated that the overexpression of dehydrin in different plants can improve the low temperature resistance, the expression of dehydrin and their accumulation play an important role in response to low temperature. In this review, the mechanisms of dehydrins（SKn, Kn, YnSKn, KnS and YnKn） in response to low temperature was described, which will provide references for further studies on enhancing the low temperature resistance of plant by molecular breeding using dehydrins.