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首页> 外文期刊>Journal of Experimental Botany >Regulation of programmed cell death by phytoglobins
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Regulation of programmed cell death by phytoglobins

机译：植物球蛋白对程序性细胞死亡的调节

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摘要

Programmed cell death (PCD) is a fundamental plant process in growth and development and in response to both biotic and abiotic stresses. Nitric oxide (NO) is a central component in determining whether a cell undergoes PCD, either as a direct elicitor of the response or as a factor in signal transduction from various hormones. Both NO and hormones that use NO as a signal transducer are mobile in the plant. Why do one set of cells die while adjacent cells remain alive, if this is the case? There is evidence to suggest that phytoglobins (Pgbs; previously termed non-symbiotic hemoglobins) may act as binary switches to determine plant cellular responses to perturbations. There are anywhere from one to five Pgb genes in plants that are expressed in response to growth and development and to stress. One of their main functions is to scavenge NO. This review will discuss how Pgb modulates cellular responses to auxin, cytokinin, and jasmonic acid during growth and development and in response to stress. The moderation in the production of reactive oxygen species (ROS) by Pgbs and the effects on PCD will also be discussed. An overall mechanism for Pgb involvement will be presented.
机译：程序性细胞死亡（PCD）是植物生长和发育以及对生物和非生物胁迫的响应的基本植物过程。一氧化氮（NO）是确定细胞是否经历PCD的重要组成部分，它是反应的直接诱发因素，还是各种激素信号转导的因素。 NO和将NO用作信号转导物的激素都可以在植物中移动。如果是这样的话，为什么一组细胞死亡而相邻细胞仍然存活？有证据表明，植物血红蛋白（Pgbs;以前称为非共生血红蛋白）可以作为确定植物细胞对扰动反应的二元开关。植物中存在从一到五种Pgb基因，它们响应生长，发育和胁迫而表达。它们的主要功能之一是清除NO。这篇综述将讨论Pgb如何在生长和发育以及对压力的反应中调节细胞对生长素，细胞分裂素和茉莉酸的反应。还将讨论Pgbs产生活性氧（ROS）的适度及其对PCD的影响。将介绍Pgb参与的总体机制。

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