细胞生长速度在叶子的宽度上协调,保持平坦
Kate Harline1,2, Brendan Lane3, Antoine Fruleux4
1Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA.
bioRxiv : the preprint server for biology
|November 19, 2025
概括
阿拉比多普西斯莉亚的状和波状 (jaw-D) 突变显示了叶子成熟的延迟,扰乱了生长协调,导致叶子失去平坦度. 这表明全球增长协调对于保持叶子形状至关重要.
科学领域:
- 植物生物学 植物生物学
- 发育生物学是发展生物学.
- 遗传学 遗传学 是一个
背景情况:
- 植物的叶子形状是由协调的细胞生长和分裂产生的.
- 保持叶子平坦性需要同步生长,特别是在上 (无轴) 和下 (无轴) 两侧之间.
研究的目的:
- 调查Arabidopsis thaliana中纹和波纹 (jaw-D) 突变表型背后的细胞动态.
- 确定变化的成熟如何影响叶子生长协调和平坦度.
主要方法:
- 发展中的野生类型和-D突变型阿拉比多普西斯叶的时间缩短实时成像.
- 细胞动态和成熟标志物的分析.
主要成果:
- D突变体表现出延迟的叶子成熟,与miR319过度表达抑制TCP转录因子一致.
- 在D突变体中,延迟成熟与中侧轴的生长协调中断有关.
- 这些生长冲突导致了特有的波形和非平的叶子表型.
结论:
- TCP转录因子在促进叶子成熟方面发挥着重要作用.
- 在野生型植物中,全球协调叶片的生长,而不仅仅是局部同步,对于保持叶片平坦性至关重要.
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