植物学报 ›› 2000, Vol. 17 ›› Issue (02): 97-107.

• 综述与专论 •    下一篇

植物细胞程序死亡的机理及其与发育的关系

崔克明   

  1. (北京大学生命科学学院 北京 100871)
  • 收稿日期:1999-04-12 修回日期:1999-04-30 出版日期:2000-03-20 发布日期:2000-03-20

Mechanisms of Programmed Cell Death and Its Relation to Development in Plants

CUI Ke-Ming   

  1. (College of Life Sciences, Peking University, Beijing 100871)
  • Received:1999-04-12 Revised:1999-04-30 Online:2000-03-20 Published:2000-03-20

摘要: 细胞程序死亡(PCD)是在植物体发育过程中普遍存在的,在发育的特定阶段发生的自然的细胞死亡过程,这一死亡过程是由某些特定基因编码的“死亡程序”控制的。PCD是细胞分化的最后阶段。细胞分化的临界期就处于死亡程序执行中的某个阶段。PCD包含启动期、效应期和清除期三个阶段,其间caspase家族起着重要作用。PCD在细胞和组织的平衡、特化,以及组织分化、器官建成和对病原体的反应等植物发育过程中起着重要作用。PCD中的形态学变化和生物化学变化都有着严格的时序性。植物的PCD和动物的PCD有许多共性,包括细胞形态和DNA降解等变化。也有一些不同,植物PCD的产物既可被其它细胞吸收利用;也可用于构建自身的次生细胞壁。

Abstract: Programmed cell death (PCD) is a natural cell death process controled by "death programme" coded by certain genes, occurring at certain stages of development, and commonly present in the process of plant development. PCD is the last stage of cell differentiation. The critical phase of cell differentiation occurs when the death programme is being run. PCD comprises of initiation, effector and degradation, during which the caspase family plays the key role. PCD is important in processes of plant development such as cell and tissue homeostasis and specialization, tissue differentiation and organ sculpting, and reactions to pathogens. The timing of morphological and biochemical changes are ordered during PCD. Some features of PCD in plants, including the changes in cell morphology and DNA degradation, are similar to those in animals. But PCD in plants is different from that in animals in that the products from PCD in plants can either be phagocytosed by other cells or used for constructing the cell's own secondary wall.