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Nature Plants:植物细胞凋亡(Perspective)

已有 3164 次阅读 2017-10-1 09:35 |个人分类:每日摘要|系统分类:论文交流

Reassessing apoptosis in plants


First author:Martin Dickman; Affiliations: Texas A&M University (德克萨斯A&M大学): Texas, USA

Corresponding author: Martin Dickman; Brett Williams (昆士兰科技大学)


Cell death can be driven by a genetically programmed signalling pathway known as programmed cell death (PCD). In plants, PCD occurs during development as well as in response to environmental and biotic stimuli. Our understanding of PCD regulation in plants has advanced significantly over the past two decades; however, the molecular machinery responsible for driving the system remains elusive. Thus, whether conserved PCD regulatory mechanisms include plant apoptosis (植物细胞凋亡) remains enigmatic (令人困惑的). Animal apoptotic regulators, including Bcl-2 family members, have not been identified in plants but expression of such regulators can trigger or suppress plant PCD. Moreover, plants exhibit nearly all of the biochemical and morphological (形态学的) features of apoptosis. One difference between plant and animal PCD is the absence of phagocytosis (吞噬作用) in plants. Evidence is emerging that the vacuole (液泡) may be key to removal of unwanted plant cells, and may carry out functions that are analogous (相似的) to animal phagocytosis. Here, we provide context for the argument that apoptotic-like cell death occurs in plants.


细胞死亡可以被遗传编码的信号通路所驱动,该过程即细胞程序性死亡PCD。在植物中,PCD在发育中响应于各种环境和生物刺激。在过去的两个世纪里我们对于植物中PCD调控的理解已经有了很大的进步,然而驱动该系统的分子机制还是不清楚的。因此,保守的PCD调控机制是否包括植物细胞凋亡还是一团谜。动物细胞凋亡调控子,包括Bcl-2家族成员在植物中还未鉴定到,然而这些调控子的表达会诱导或抑制植物PCD。此外,植物存在几乎所有的细胞凋亡的生理生化及形态学上的特征。其中与动物细胞凋亡所不同的是,植物中缺失了一个吞噬作用。有证据表明液泡可能是移除多余植物细胞的关键所在,并与动物吞噬作用功能类似。本文,作者讨论了类似细胞凋亡的植物细胞死亡研究进展。


通讯:Martin Dickman (https://plantpathology.tamu.edu/people/dickman-dr-martin-b/)


个人简介:1986年,美国夏威夷大学,植物病理学博士。


研究方向:真菌-植物相互作用。


doi: 10.1038/s41477-017-0020-x


Journal: Nature Plants
Published online: September 25, 2017.

P.S. 欢迎关注微信公众号:微信号Plant_Frontiers


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