Precise coordination between cells and tissues is essential for differential growth in plants. During lateral root formation in Arabidopsis thaliana, the endodermis is actively remodeled to allow outgrowth of the new organ. Here, we show that microtubule arrays facing lateral root founder cells display a higher order compared to arrays on the opposite wall of the same cell, and this asymmetry is required for endodermal remodeling and lateral root initiation. We identify that MICROTUBULE ASSOCIATED PROTEIN 70-5 is necessary for the establishment of this spatially defined microtubule organization and endodermis remodeling, and thus contributes to lateral root morphogenesis. We propose that MAP70-5 and cortical microtubule arrays in the endodermis integrate the mechanical signals generated by lateral root outgrowth, facilitating the channeling of organogenesis.

中文翻译：

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基于微管的机械冲突感知控制植物器官形态发生

细胞和组织之间的精确协调对于植物的差异生长至关重要。在拟南芥侧根形成过程中，内皮层被积极改造以允许新器官的生长。在这里，我们表明，与同一细胞相对壁上的阵列相比，面向侧根创始人细胞的微管阵列显示出更高的顺序，并且这种不对称性是内胚层重塑和侧根起始所必需的。我们确定微管相关蛋白 70-5 是建立这种空间定义的微管组织和内皮重塑所必需的，因此有助于侧根形态发生。我们建议内皮层中的 MAP70-5 和皮质微管阵列整合了侧根生长产生的机械信号，