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首页> 外文期刊>The Plant Cell >Amino Acid Homeostasis Modulates Salicylic Acid-Associated Redox Status and Defense Responses in Arabidopsis
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Amino Acid Homeostasis Modulates Salicylic Acid-Associated Redox Status and Defense Responses in Arabidopsis

机译：氨基酸稳态调节拟南芥中水杨酸相关的氧化还原状态和防御反应。

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摘要

The tight association between nitrogen status and pathogenesis has been broadly documented in plant-pathogen interactions. However, the interface between primary metabolism and disease responses remains largely unclear. Here, we show that knockout of a single amino acid transporter, LYSINE HISTIDINE TRANSPORTER1 (LHT1), is sufficient for Arabidopsis thaliana plants to confer a broad spectrum of disease resistance in a salicylic acid-dependent manner. We found that redox fine-tuning in photosynthetic cells was causally linked to the lht1 mutant-associated phenotypes. Furthermore, the enhanced resistance in lht1 could be attributed to a specific deficiency of its main physiological substrate, Gln, and not to a general nitrogen deficiency. Thus, by enabling nitrogen metabolism to moderate the cellular redox status, a plant primary metabolite, Gln, plays a crucial role in plant disease resistance.
机译：氮状况与发病机理之间的紧密联系已在植物与病原体的相互作用中得到了广泛的证明。然而，初级代谢和疾病反应之间的接口仍然不清楚。在这里，我们显示出单个氨基酸转运蛋白赖氨酸组氨酸转运蛋白1（LHT1）的敲除足以使拟南芥植物以水杨酸依赖性方式赋予广谱的抗病性。我们发现，光合细胞中的氧化还原微调与lht1突变体相关的表型有因果关系。此外，lht1抗性增强可能归因于其主要生理底物Gln的特定缺乏，而不是普遍的氮缺乏。因此，通过使氮代谢能够调节细胞的氧化还原状态，植物主要代谢产物Gln在植物抗病性中起着至关重要的作用。

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