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相关概念视频

Cell Signaling in Plants01:25

Cell Signaling in Plants

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Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
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During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
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Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
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Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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类信号调节叶子衰老的信号.

Xueting Li1, Xiaolin Si1, Zhenbiao Zhang1

  • 1Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China.

Annals of botany
|July 12, 2025
PubMed
概括
此摘要是机器生成的。

植物小调节叶子衰老,这是一个关键的营养循环过程. 这篇评论详细介绍了这些信号分子 - - 积极和消极的调节者 - - 如何通过各种途径影响衰老.

关键词:
细胞与细胞之间的通信.叶子衰老 叶子衰老可以发出信号.

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科学领域:

  • 植物生物学 植物生物学
  • 分子信号传输的方法
  • 植物生理学 植物生理学

背景情况:

  • 叶子衰老是营养重新调动的重要过程,从老化的叶子到发育的组织.
  • 植物小作为关键的细胞间信号,调节各种发育和压力反应.
  • 新出现的证据凸显了小在控制叶子衰老的进展中的重要作用.

研究的目的:

  • 审查最近关于小在调节叶子衰老中的作用的研究.
  • 阐明涉及介导叶子衰老的多种信号通路.
  • 提供对叶子衰老的积极和消极调节者的全面了解.

主要方法:

  • 对最近关于小和叶子衰老的研究进行文献综述.
  • 对已识别的小调节剂 (如CLE,SCOOP) 和它们的机制进行分析.
  • 检查涉及受体类激酶,活性氧物种 (ROS) 和乙烯的信号通路.

主要成果:

  • 像CLE14和CLE42这样的特定小可以通过调节ROS和乙烯来抑制叶子衰老.
  • 其他,SCOOP10和SCOOP12,通过MIK2受体类激酶对抗调节叶子衰老.
  • 小的功能是促进和抑制叶子衰老,表明复杂的调节网络.

结论:

  • 小是叶子衰老的关键调节者,通过明显的信号级联影响该过程.
  • 了解这些介导通路为控制营养分配和植物发育提供了洞察力.
  • 对小信号的进一步研究将加深我们对植物衰老和资源管理的理解.