植物低温信号的感知、转导与转录调控

Signal Perception,Transduction and Transcriptional Regulation during Cold Stress in Plant

低温是植物生长的主要环境胁迫因子之一。植物对低温的应激是一个复杂的过程,包括低温信号的感知、信号转导和转录调控等阶段。低温可以通过质膜流动性的改变被质膜感知,也可以通过质膜上的钙离子通透性通道、组氨酸激酶、受体激酶和磷酸酯酶感知。低温信号转导包括钙信号途径和其他信号途径,其中钙信号途径是低温应答过程中重要的信号途径。在此途径中,因低温增加的胞质钙离子能被CDPK、磷酸酶和MAPK识别并传导;其他信号途径主要与ABA有关。低温信号最终将启动CBF和非CBF介导的转录调控,提高植物的低温抗性。

Cold is one of the key environmental stressors which affect plant growth and development. The response process of plant to cold is a complex procedure. It includes several steps, such as low temperature signal perception, signal transduction, transcription regulation. Cold can be perceived by plasma membrane either due to changes in membrane fluidity or with the help of sensors like Ca^2 ＋ permeable channels, histidine kinases, receptor kinases and phospholipases. Cold signal transduction includes calcium signal pathway and other signal pathways, of which calcium signal pathway is an important pathway of cold response process in plant. In this pathway, cytosolic Ca^2＋ induced by cold can be recognized and transduced by CDPKs, phoshatase and MAPKs. Other signal pathways are mainly related to ABA. Cold signal will at last switch on CBF and non-CBF independent transcriptional cascade, thus to improve plant resistance to cold.