Laying it on thick: a study in secondary growth.
Laying it on thick: a study in secondary growth.
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DOI：
10.1093/jxb/erab455
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发表时间：
2022-01-27
影响因子：
6.9
通讯作者：
Etchells JP
中科院分区：
文献类型：
--
作者：
Turley EK;Etchells JP
次生维管组织的发育增强了植物体的运输能力和机械强度，同时以木材的形式贡献了世界生物量的很大一部分。构成维管分生组织的形成层的细胞分裂提供祖细胞，由此衍生出导电的木质部和韧皮部。形成层在两个方面是一种不同寻常的干细胞群体，这使得它成为发展研究的一个有趣课题。首先，它出现在胚胎萌发后，因此代表了一种理解胚胎发生之外的干细胞起始的模型。其次，木质部和韧皮部在形成层干细胞的两侧分化，使其具有双面性。最近对拟南芥的研究发现，对形成层形成、形成和维持的分子机制有了深入的了解。在这篇综述中，通过移动转录因子、肽受体模块和植物激素描述了细胞间信号传导的作用。这些调控途径之间的串扰正变得越来越明显，但潜在的机制尚未完全了解。未来研究多种独立鉴定的调控因子之间的相互作用，以及它们在树木中的同源物的功能，将加深我们对植物径向生长的理解。本文综述了拟南芥维管形成层形成和维持的分子机制。
The development of secondary vascular tissue enhances the transport capacity and mechanical strength of plant bodies, while contributing a huge proportion of the world’s biomass in the form of wood. Cell divisions in the cambium, which constitutes the vascular meristem, provide progenitors from which conductive xylem and phloem are derived. The cambium is a somewhat unusual stem cell population in two respects, making it an interesting subject for developmental research. Firstly, it arises post-germination, and thus represents a model for understanding stem cell initiation beyond embryogenesis. Secondly, xylem and phloem differentiate on opposing sides of cambial stem cells, making them bifacial in nature. Recent discoveries in Arabidopsis thaliana have provided insight into the molecular mechanisms that regulate the initiation, patterning, and maintenance of the cambium. In this review, the roles of intercellular signalling via mobile transcription factors, peptide–receptor modules, and phytohormones are described. Crosstalk between these regulatory pathways is becoming increasingly apparent, yet the underlying mechanisms are not fully understood. Future study of the interaction between multiple independently identified regulators, as well as the functions of their orthologues in trees, will deepen our understanding of radial growth in plants. We review the literature describing the molecular mechanisms by which the vascular cambium is initiated and maintained in Arabidopsis.
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影响因子：
6.9
作者：
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通讯作者：
Spokevicius, Antanas V.
影响因子：
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影响因子：
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通讯作者：
Greb T