Mobile signals, patterning, and positional information in root development.

IF 6.5 1区 生物学 Q1 PLANT SCIENCES
Itay Cohen, Idan Efroni
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引用次数: 0

Abstract

Multicellular organisms use mobile intercellular signals to generate spatiotemporal patterns of growth and differentiation. These signals, termed morphogens, arise from localized sources and move by diffusion or directional transport to be interpreted at target cells. The classical model for a morphogen is where a substance diffuses from a source to generate a concentration gradient that provides positional information across a field. This concept, presented by Wolpert and popularized as the "French Flag Model," remains highly influential, but other patterning models, which do not rely on morphogen gradients, also exist. Here, we review current evidence for mobile morphogenetic signals in plant root development and how they fit within existing conceptual frameworks for pattern formation. We discuss how the signals are formed, distributed, and interpreted in space and time, emphasizing the regulation of movement on the ability of morphogens to specify patterns. While significant advances have been made in the field since the first identification of mobile morphogenetic factors in plants, key questions remain to be answered, such as how morphogen movement is regulated, how these mechanisms allow scaling in different species, and how morphogens act to enable plant regeneration in response to damage.

根系发育过程中的移动信号、模式和位置信息
多细胞生物利用细胞间的移动信号来产生生长和分化的时空模式。这些信号被称为形态发生器,来自局部来源,通过扩散或定向运输在目标细胞中传播。形态发生器的经典模型是一种物质从源头扩散,产生浓度梯度,提供整个区域的位置信息。这一概念由沃尔珀特提出,并被推广为 "法国国旗模型",至今仍具有很大影响力,但也存在其他不依赖形态发生梯度的模式化模型。在此,我们回顾了植物根系发育过程中移动形态发生信号的现有证据,以及这些信号如何与现有的模式形成概念框架相适应。我们讨论了这些信号是如何在空间和时间上形成、分布和解释的,并强调了移动对形态发生器指定模式能力的调节作用。自首次发现植物中的移动形态发生因子以来,该领域已取得了重大进展,但仍有一些关键问题有待解答,如形态发生因子的移动如何受到调控、这些机制如何在不同物种中实现扩展,以及形态发生因子如何发挥作用使植物在受到损害时能够再生。
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来源期刊
Plant Physiology
Plant Physiology 生物-植物科学
CiteScore
12.20
自引率
5.40%
发文量
535
审稿时长
2.3 months
期刊介绍: Plant Physiology® is a distinguished and highly respected journal with a rich history dating back to its establishment in 1926. It stands as a leading international publication in the field of plant biology, covering a comprehensive range of topics from the molecular and structural aspects of plant life to systems biology and ecophysiology. Recognized as the most highly cited journal in plant sciences, Plant Physiology® is a testament to its commitment to excellence and the dissemination of groundbreaking research. As the official publication of the American Society of Plant Biologists, Plant Physiology® upholds rigorous peer-review standards, ensuring that the scientific community receives the highest quality research. The journal releases 12 issues annually, providing a steady stream of new findings and insights to its readership.
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