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首页> 外文期刊>Journal of Experimental Botany >Molecular mechanisms involved in plant adaptation to low K+ availability
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Molecular mechanisms involved in plant adaptation to low K+ availability

机译：植物适应低于K +可用性的分子机制

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摘要

Potassium is a major inorganic constituent of the living cell and the most abundant cation in the cytosol. It plays a role in various functions at the cell level, such as electrical neutralization of anionic charges, protein synthesis, long- and short-term control of membrane polarization, and regulation of the osmotic potential. Through the latter function, K is involved at the whole-plant level in osmotically driven functions such as cell movements, regulation of stomatal aperture, or phloem transport. Thus, plant growth and development require that large amounts of K are taken up from the soil and translocated to the various organs. In most ecosystems, however, soil K availability is low and fluctuating, so plants have developed strategies to take up K more efficiently and preserve vital functions and growth when K availability is becoming limited. These strategies include increased capacity for high-affinity K uptake from the soil, K redistribution between the cytosolic and vacuolar pools, ensuring cytosolic homeostasis, and modification of root system development and architecture. Our knowledge about the mechanisms and signalling cascades involved in these different adaptive responses has been rapidly growing during the last decade, revealing a highly complex network of interacting processes. This review is focused on the different physiological responses induced by K deprivation, their underlying molecular events, and the present knowledge and hypotheses regarding the mechanisms responsible for K sensing and signalling.
机译：钾是活细胞的主要无机成分和细胞溶溶胶中最丰富的阳离子。它在细胞层的各种功能中起作用，例如阴离子电荷，蛋白质合成，膜极化的长期控制，以及调节渗透势的反弹。通过后一函数，k参与渗透驱动功能的全植物水平，例如细胞运动，气孔孔的调节或韧皮型传输。因此，植物生长和发育要求从土壤中占据大量K并向各种器官倾斜。然而，在大多数生态系统中，土壤K可用性低且波动，因此工厂已经开发了更有效的策略，并在K可用性变得有限时保持重要功能和增长。这些策略包括从土壤中的高亲和力K摄取的增加，k细胞溶质和真空池之间的再分布，确保细胞源性稳态，以及根系开发和建筑的改变。我们对涉及这些不同自适应反应的机制和信号级联的知识在过去十年中一直在迅速增长，揭示了一种高度复杂的交互过程网络。本综述专注于K剥夺，其潜在的分子事件和本发明知识和假设诱导的不同生理反应，以及关于负责K感测和信号传导的机制。

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  • 来源
    《Journal of Experimental Botany》 |2014年第3期|共16页
  • 作者

    Cherel Isabelle; Lefoulon Cecile; Boeglin Martin; Sentenac Herve;

  • 作者单位

    Biochimie et Physiologie Moléculaire des Plantes Institut de Biologie Intégrative des Plantes UMR 5004 CNRS/UMR 0386 INRA/ Montpellier SupAgro/Université Montpellier 2 F-34060 Montpellier Cedex 1 France;

    Biochimie et Physiologie Moléculaire des Plantes Institut de Biologie Intégrative des Plantes UMR 5004 CNRS/UMR 0386 INRA/ Montpellier SupAgro/Université Montpellier 2 F-34060 Montpellier Cedex 1 France;

    Biochimie et Physiologie Moléculaire des Plantes Institut de Biologie Intégrative des Plantes UMR 5004 CNRS/UMR 0386 INRA/ Montpellier SupAgro/Université Montpellier 2 F-34060 Montpellier Cedex 1 France;

    Biochimie et Physiologie Moléculaire des Plantes Institut de Biologie Intégrative des Plantes UMR 5004 CNRS/UMR 0386 INRA/ Montpellier SupAgro/Université Montpellier 2 F-34060 Montpellier Cedex 1 France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Auxin; ethylene; K + membrane transport; K + starvation; plant K + nutrition; reactive oxygen species (ROS); root;

    机译：植物素;乙烯;k +膜运输;K +饥饿;植物K +营养;活性氧（ROS）;根;

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