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根烯酸酸盐的碳活化酶活性对于二色的耐受性至关重要氨营养营养

A J Marín-Peña¹, I Vega-Mas¹, I Busturia¹

¹Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain.

Plant physiology and biochemistry : PPB

|December 28, 2023

概括

根烯酸盐碳氧化酶 (PEPC) 和三碳酸 (TCA) 循环对于植物来管理氨压力至关重要. 降低PEPC活性会在高氨条件下损害生长和新陈代谢.

科学领域:

植物生理学植物生理学
生物化学生物化学
农业科学农业科学

背景情况:

烯酸炭化酶 (PEPC) 对植物碳和代谢至关重要.
非光合作用PEPC作为一种性酶,为三碳酸 (TCA) 循环提供碳骨.
氨 (NH4+) 营养可以诱导植物的压力,增加对碳骨的需求以吸收.

研究的目的:

为了研究根PEPC和TCA循环在 (Sorghum bicolor) 中的作用,在氨营养下种植.
了解PEPC活动减少对植物对氨应激反应的影响.

主要方法:

利用RNA干扰 (RNAi) 来创建带有根PEPC异型SbPPC3.3的表达减少的 Sorghum 线.
在氨营养下评估植物生物质积累,氨水平和根中的有机酸概况.
基因沉默 (Ppc3) 线与野生类型 (WT) 植物进行比较.

主要成果:

与压力下的WT工厂相比,SbPPC3沉默导致氨过敏,其特点是Ppc3线路中的生物质积累减少.
沉默的植物表现出初级新陈代谢的放松,包括在根部积聚氨.
观察到TCA循环功能的变化,有机酸在Ppc3线根中的积累证明了这一点.

结论:

非光合作用PEPC,特别是根中的SbPPC3,在能够应对高外部可用性方面发挥着至关重要的作用.
根TCA循环对于在氨压力下维持代谢平衡至关重要.
这些发现凸显了根PEPC和TCA循环功能的重要性,对于C4谷物作物的氨耐受性.

关键词:

氨的含量是多少?氨的含量是多少?碳碳碳碳碳代谢过程中的代谢.气气是一种气.这是一款PEPC.压力压力压力压力三碳酸循环的三碳酸循环.

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