Wu Lei, Wang Jun-Li, Li Xiao-Feng, Guo Guang-Qin
Institute of Cell Biology and MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
Int J Mol Sci. 2021 Apr 8;22(8):3874. doi: 10.3390/ijms22083874.
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.
植物根系是一个动态系统，能够通过不断调整其生长发育来迅速响应外部环境刺激。调节这种生长发育的一个关键因素是生长素和细胞分裂素这两种植物激素之间精确调节的相互作用。生长素的梯度分布不仅对根系的生长发育很重要，而且对各种反应中的根系生长也很重要。最近的研究揭示了细胞分裂素介导的局部生长素生物合成/代谢调节以及在建立活跃生长素梯度过程中的重新分布的分子机制，从而导致初生根根尖的细胞分裂和分化。在这篇综述中，我们将重点关注根尖中细胞分裂素控制生长素梯度的分子机制。
