Hormonal Regulation of Stem Cell Proliferation at the Arabidopsis Thaliana Root Stem Cell Niche
fpls-12-628491 March 1, 2021 Time: 12:48 # 1 REVIEW published: 03 March 2021 doi: 10.3389/fpls.2021.628491 Hormonal Regulation of Stem Cell Proliferation at the Arabidopsis thaliana Root Stem Cell Niche Mónica L. García-Gómez1,2, Adriana Garay-Arroyo1,2, Berenice García-Ponce1, María de la Paz Sánchez1 and Elena R. Álvarez-Buylla1,2* 1 Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico, 2 Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Ciudad de México, Mexico The root stem cell niche (SCN) of Arabidopsis thaliana consists of the quiescent center (QC) cells and the surrounding initial stem cells that produce progeny to replenish all the tissues of the root. The QC cells divide rather slowly relative to the initials, yet most root tissues can be formed from these cells, depending on the requirements of the plant. Hormones are fundamental cues that link such needs with the cell proliferation and differentiation dynamics at the root SCN. Nonetheless, the crosstalk between hormone signaling and the mechanisms that regulate developmental adjustments is still not Edited by: fully understood. Developmental transcriptional regulatory networks modulate hormone Raffaele Dello Ioio, Sapienza University of Rome, Italy biosynthesis, metabolism, and signaling, and conversely, hormonal responses can affect Reviewed by: the expression of transcription factors involved in the spatiotemporal patterning at Renze Heidstra, the root SCN. Hence, a complex genetic–hormonal regulatory network underlies root Wageningen University and Research, Netherlands patterning, growth, and plasticity in response to changing environmental conditions.
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