Abstract
The plant root absorbs water and nutrients, anchors the plant in the soil, and promotes plant development. Root is developed from root apical meristem (RAM), which is formed during embryo stage and is maintained by dividing stem cells. Plant hormones have a predominant role in RAM maintenance. This review evaluates the functional crosstalk among three major hormones (auxin, cytokinin, and brassinolide) in RAM development in Arabidopsis, integrating a variety of experimental data into a regulatory network and revealing multiple layers of complexity in the crosstalk among these three hormones. We also discuss possible directions for future research on the roles of hormones in regulating RAM development and maintenance.
Keywords:
RAM; auxin; brassinosteroid; crosstalk; cytokinin; hormone.
MeSH terms
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Arabidopsis* / growth & development
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Arabidopsis* / metabolism
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Brassinosteroids / metabolism
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Cytokinins / metabolism
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Gene Expression Regulation, Plant
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Indoleacetic Acids / metabolism
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Meristem / growth & development
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Meristem / metabolism
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Plant Growth Regulators* / metabolism
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Plant Roots* / growth & development
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Plant Roots* / metabolism
Substances
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Plant Growth Regulators
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Cytokinins
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Indoleacetic Acids
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Brassinosteroids
Grants and funding
This study was supported by the National Natural Science Foundation of China [32300304 to H.Z.], the funding from Hebei Natural Science Foundation [C2024205009 to H.Z., C2024205036 to L.G.], Science Foundation of Hebei Normal University [L2024B19 to H.Z., L2021B18 to L.G.]. The funding from Hebei Graduate Innovation Fundation Project [XCXZZBS202407 to Y.M.]. Supported by Scientific Research Project of Hengshui University [2023GC05]. Supported by the Education Department of Hebei [QN2024259].