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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Redox regulation of intercellular transport
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Redox regulation of intercellular transport

机译：氧化还原调节细胞间运输

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摘要

Plant cells communicate with each other via plasmodesmata (PDs) in order to orchestrate specific responses to environmental and developmental cues. At the same time, environmental signals regulate this communication by promoting changes in PD structure that modify symplastic permeability and, in extreme cases, isolate damaged cells. Reactive oxygen species (ROS) are key messengers in plant responses to a range of biotic and abiotic stresses. They are also generated during normal metabolism, and mediate signaling pathways that modulate plant growth and developmental transitions. Recent research has suggested the participation of ROS in the regulation of PD transport. The study of several developmental and stress-induced processes revealed a co-regulation of ROS and callose (a cell wall polymer that regulates molecular flux through PDs). The identification of Arabidopsis mutants simultaneously affected in cell redox homeostasis and PD transport, and the histological detection of hydrogen peroxide and peroxidases in the PDs of the tomato vascular cambium provide new information in support of this novel regulatory mechanism. Here, we describe the evidence that supports a role for ROS in the regulation of callose deposition and/or in the formation of secondary PD, and discuss the potential importance of this mechanism during plant growth or defense against environmental stresses.
机译：植物细胞通过纤毛虫（PD）相互通信，以协调对环境和发育线索的特定反应。同时，环境信号通过促进PD结构的改变来调节这种交流，PD结构的改变会改变共生的通透性，在极端情况下会隔离受损的细胞。活性氧（ROS）是植物应对一系列生物和非生物胁迫的关键信使。它们也在正常代谢期间产生，并介导调节植物生长和发育过渡的信号传导途径。最近的研究表明ROS参与PD运输的调节。对几种发育和压力诱导过程的研究揭示了ROS和ose质（一种调节PD分子通量的细胞壁聚合物）的共同调控。鉴定同时受细胞氧化还原稳态和PD转运影响的拟南芥突变体，以及组织学检测番茄血管形成层的PD中的过氧化氢和过氧化物酶，为支持这种新颖的调控机制提供了新的信息。在这里，我们描述了支持ROS在调节ose的沉积和/或形成继发性PD中起作用的证据，并讨论了该机制在植物生长或防御环境胁迫中的潜在重要性。

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