Lateral Root versus Nodule: The Auxin-Cytokinin Interplay
Lateral Root versus Nodule: The Auxin-Cytokinin Interplay
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DOI：
10.1007/s00344-023-10983-4
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发表时间：
2023-04-06
影响因子：
4.8
通讯作者：
Lebedeva，Maria A.
中科院分区：
文献类型：
--
作者：
Azarakhsh，Mahboobeh;Lebedeva，Maria A.
根瘤是豆科植物根部与固氮细菌共生的结果。共生根瘤的发育与侧根有共同的发育过程，包括中柱鞘的细胞增殖和导致原基形成的皮质细胞层，这两个器官被认为是进化相关的。它们的发育是在植物激素，特别是生长素和细胞分裂素的帮助下实现的。由于共同的进化起源，激素途径和反应可能在侧根和根瘤发育过程中对细胞命运的规范中具有相似的功能。已知生长素和细胞分裂素都积极调节结节原基的发育。而在侧根发育过程中，生长素是一个关键的正调控因子，而细胞分裂素则抑制侧根发育。因此，比较研究生长素和细胞分裂素在这两个器官的发育过程中的作用，以阐明它们的身份是如何建立的，应该是特别有趣的。本文综述了生长素和细胞分裂素在共生根瘤和侧根发育过程中的作用，重点讨论了它们在侧根和根瘤发育过程中作用的异同。本文综述了生长素和细胞分裂素在侧根和共生根瘤形成过程中的生物合成、运输和响应的时空特征，有助于阐明这两个根侧根器官的身份如何依赖于生长素和细胞分裂素的相互作用。图形抽象
Nodules are formed as a result of symbiosis with nitrogen-fixing bacteria on the roots of legume plants. Symbiotic nodule development shares common developmental processes with lateral roots, including cell proliferation of the pericycle and cortical cell layers leading to primordium formation, and both these organs are assumed to be evolutionarily related. The progression of their development is realized with the help of phytohormones, in particular auxin and cytokinin. Due to common evolutionary origin, the hormonal pathway and response may have similar functionality in cell fate specification during lateral root and nodule development. It is known that auxin and cytokinin both positively regulate nodule primordia development. However during lateral root development, auxin is a key positive regulator, while cytokinin suppresses lateral root development. Therefore, a comparative review of auxin and cytokinin action in the development of these two organs to elucidate how their identity is established should be of special interest. This review discusses the involvement of auxin and cytokinin in the development of symbiotic nodules and lateral roots, with a special focus on the similarity and differences of their action during lateral root and nodule developmental processes. The spatio-temporal peculiarities of auxin and cytokinin biosynthesis, transport and response during lateral root and symbiotic nodule formation are reviewed, which should help to clarify how the identity of these two root lateral organs depends on auxin-cytokinin interplay.Graphical Abstract