TORC pathway intersects with a calcium sensor kinase network to regulate potassium sensing in Arabidopsis
TORC pathway intersects with a calcium sensor kinase network to regulate potassium sensing in Arabidopsis
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DOI：
10.1073/pnas.2316011120
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发表时间：
2023-11
影响因子：
11.1
通讯作者：
Kun-Lun Li;Hui Xue;R. Tang;Sheng Luan
中科院分区：
文献类型：
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作者：
Kun-Lun Li;Hui Xue;R. Tang;Sheng Luan
土壤中的低养分状况通常限制植物生长，使得肥料的使用成为作物生产的必要条件。然而，大量使用化肥是昂贵的并且污染环境。了解植物如何应对和适应不断变化的养分状况，对于提高养分利用效率和减少化肥的育种工作至关重要。本文描述了一种允许植物根据外部钾（K）状况调节生长的机制。高钾激活雷帕霉素复合物（TORC）途径的目标，这反过来又使低钾响应性钙调磷酸酶B样蛋白（CBL）-CBL相互作用激酶（CIPK）网络失活，而钾缺乏则打开CBL-CIPK网络，抑制TORC途径，这是植物适应和生长促进之间依赖于钾的可用性的潜在转变。
Significance Low nutrient status in soils is often limiting to plant growth, making the use of fertilizers a necessity in crop production. However, heavy use of fertilizers is costly and pollutes environment. Understanding how plants respond and adapt to changing nutrient status is critical for breeding effort to increase nutrient use efficiency and cut fertilizers. This paper describes a mechanism that allows plants to adjust growth based on external potassium (K) status. High-K activates the target of rapamycin complex (TORC) pathway that in turn inactivates the low-K-responsive calcineurin B-like proteins (CBL)–CBL-interacting kinases (CIPK) network, whereas K-deficiency turns on the CBL–CIPK network that inhibits the TORC pathway, underlying transitions between adaptation and growth promotion in plants depending on K availability.