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首页> 外文期刊>PLoS Genetics >The Arabidopsis receptor kinase STRUBBELIG regulates the response to cellulose deficiency
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The Arabidopsis receptor kinase STRUBBELIG regulates the response to cellulose deficiency

机译：Arabidopsis受体激酶Strubbelig调节对纤维素缺乏的反应

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Plant cells are encased in a semi-rigid cell wall of complex build. As a consequence, cell wall remodeling is essential for the control of growth and development as well as the regulation of abiotic and biotic stress responses. Plant cells actively sense physico-chemical changes in the cell wall and initiate corresponding cellular responses. However, the underlying cell wall monitoring mechanisms remain poorly understood. In Arabidopsis the atypical receptor kinase STRUBBELIG (SUB) mediates tissue morphogenesis. Here, we show that SUB -mediated signal transduction also regulates the cellular response to a reduction in the biosynthesis of cellulose, a central carbohydrate component of the cell wall. SUB signaling affects early increase of intracellular reactive oxygen species, stress gene induction as well as ectopic lignin and callose accumulation upon exogenous application of the cellulose biosynthesis inhibitor isoxaben. Moreover, our data reveal that SUB signaling is required for maintaining cell size and shape of root epidermal cells and the recovery of root growth after transient exposure to isoxaben. SUB is also required for root growth arrest in mutants with defective cellulose biosynthesis. Genetic data further indicate that SUB controls the isoxaben-induced cell wall stress response independently from other known receptor kinase genes mediating this response, such as THESEUS1 or MIK2 . We propose that SUB functions in a least two distinct biological processes: the control of tissue morphogenesis and the response to cell wall damage. Taken together, our results reveal a novel signal transduction pathway that contributes to the molecular framework underlying cell wall integrity signaling.
机译：将植物细胞包装在复杂构建的半刚性细胞壁中。因此，细胞壁重塑对于对生长和发展的控制至关重要以及非生物和生物应激反应的调节。植物细胞主动感测细胞壁的物理化学变化并引发相应的细胞反应。然而，潜在的细胞壁监测机制仍然明白很差。在拟南芥中，非典型受体激酶Strubbelig（亚）介导组织形态发生。这里，我们表明副介导的信号转导还调节细胞壳生物合成的细胞响应，细胞壁的中央碳水化合物组分。子信号传导影响细胞内反应性氧，胁迫基因诱导以及异位木质素的早期增加，并在外源性纤维素生物合成抑制剂异氧吩的外源性施用时给予愈合积累。此外，我们的数据揭示了维持细胞尺寸和根表皮细胞的细胞尺寸和形状以及瞬态暴露于异氧吩咐后的根生长的回收。含有缺陷纤维素生物合成的突变体中的根生长骤停用也需要亚。遗传数据进一步表明，亚脱氧诱导的细胞壁应力响应独立于介导该响应的其他已知的受体激酶基因，例如诸如悬垂的α或mik2。我们提出了至少两个不同的生物过程中的亚功能：控制组织形态发生和对细胞壁损伤的响应。我们的结果揭示了一种新的信号转导途径，其有助于潜在的细胞壁完整性信号传导的分子框架。

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