应激致死:转录因子在非生物和生物刺激诱导的植物程序性细胞死亡中的作用

Stressed to Death: The Role of Transcription Factors in Plant Programmed Cell Death Induced by Abiotic and Biotic Stimuli.

作者信息

Burke Rory, Schwarze Johanna, Sherwood Orla L, Jnaid Yasmine, McCabe Paul F, Kacprzyk Joanna

机构信息

School of Biology and Environmental Science, University College Dublin, Dublin, Ireland.

出版信息

Front Plant Sci. 2020 Aug 12;11:1235. doi: 10.3389/fpls.2020.01235. eCollection 2020.

Abstract

Programmed cell death (PCD) is a genetically controlled pathway that plants can use to selectively eliminate redundant or damaged cells. In addition to its fundamental role in plant development, PCD can often be activated as an essential defense response when dealing with biotic and abiotic stresses. For example, localized, tightly controlled PCD can promote plant survival by restricting pathogen growth, driving the development of morphological traits for stress tolerance such as aerenchyma, or triggering systemic pro-survival responses. Relatively little is known about the molecular control of this essential process in plants, especially in comparison to well-described cell death models in animals. However, the networks orchestrating transcriptional regulation of plant PCD are emerging. Transcription factors (TFs) regulate the clusters of stimuli inducible genes and play a fundamental role in plant responses, such as PCD, to abiotic and biotic stresses. Here, we discuss the roles of different classes of transcription factors, including members of NAC, ERF and WRKY families, in cell fate regulation in response to environmental stresses. The role of TFs in stress-induced mitochondrial retrograde signaling is also reviewed in the context of life-and-death decisions of the plant cell and future research directions for further elucidation of TF-mediated control of stress-induced PCD events are proposed. An increased understanding of these complex signaling networks will inform and facilitate future breeding strategies to increase crop tolerance to disease and/or abiotic stresses.

摘要

程序性细胞死亡(PCD)是一种植物可用于选择性清除冗余或受损细胞的基因控制途径。除了在植物发育中的基本作用外,PCD在应对生物和非生物胁迫时,通常可作为一种重要的防御反应被激活。例如,局部严格控制的PCD可通过限制病原体生长、促进诸如通气组织等抗逆形态特征的发育或触发系统性的促生存反应来提高植物的存活率。相较于动物中描述详尽的细胞死亡模型,人们对植物中这一重要过程的分子调控了解相对较少。然而,协调植物PCD转录调控的网络正在形成。转录因子(TFs)调控刺激诱导基因簇,并在植物对非生物和生物胁迫(如PCD)的反应中发挥重要作用。在此,我们讨论不同类别的转录因子,包括NAC、ERF和WRKY家族成员,在响应环境胁迫时细胞命运调控中的作用。还在植物细胞生死抉择的背景下综述了转录因子在胁迫诱导的线粒体逆行信号传导中的作用,并提出了进一步阐明转录因子介导的胁迫诱导PCD事件控制的未来研究方向。对这些复杂信号网络的深入理解将为未来提高作物对病害和/或非生物胁迫耐受性的育种策略提供信息并提供便利。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56b9/7434935/d9c2b10659bb/fpls-11-01235-g001.jpg

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