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Cytokinin-Controlled Gradient Distribution of Auxin in Arabidopsis Root Tip

Journal

Publisher

MDPI
DOI: 10.3390/ijms22083874

Keywords

cytokinin; auxin; biosynthesis; metabolism; auxin transport; cell division; cell differentiation; root meristem

Funding

  1. National Natural Science Foundation of China [31970713]
  2. Fundamental Research Funds for the Central Universities [lzujbky-2020-33]
  3. Natural Science Foundation of Gansu Province [20JR5RA270]

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The plant root is a dynamic system that responds to external environmental stimuli by adjusting its growth and development. The finely tuned cross-talk between auxin and cytokinin phytohormones plays a key role in regulating this process. Recent studies have revealed the molecular mechanisms behind cytokinin-controlled auxin gradients in root tips, affecting cell division and differentiation.
The plant root is a dynamic system, which is able to respond promptly to external environmental stimuli by constantly adjusting its growth and development. A key component regulating this growth and development is the finely tuned cross-talk between the auxin and cytokinin phytohormones. The gradient distribution of auxin is not only important for the growth and development of roots, but also for root growth in various response. Recent studies have shed light on the molecular mechanisms of cytokinin-mediated regulation of local auxin biosynthesis/metabolism and redistribution in establishing active auxin gradients, resulting in cell division and differentiation in primary root tips. In this review, we focus our attention on the molecular mechanisms underlying the cytokinin-controlled auxin gradient in root tips.

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