相关实验视频
Updated: Feb 14, 2026

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
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在食用葡萄中,VviAMT4;1 是一种高 afinity 的氨运输体.
Huilin Xiao1,2, Matthew Shi2,3,4, Yanwen Tang2
1Yantai Academy of Agricultural Sciences, Yantai 264000, China.
Plants (Basel, Switzerland)
|February 13, 2026
概括
研究人员在食用葡萄中发现了VviAMT4;1基因,该基因对氨运输至关重要. 它的表达在根部是最高的,并且随着氨物耗尽而增加,揭示了对果树营养吸收的洞察力.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 氨运输体 (AMT) 是氨 (NH4+或NH3) 吸收和运输的重要膜蛋白.
- 了解植物同化机制对于农业生产率至关重要.
研究的目的:
- 从食用葡萄"Yanpu No.2"中分离和描述编码氨运输体基因VviAMT4;1的基因.
- 研究VviAMT4;1的表达模式和功能性质,以应对营养的可用性和环境条件.
主要方法:
- 从食用葡萄中对VviAMT4;1的基因分离和鉴定.
- 在不同组织和不同度下对VviAMT4;1基因表达的定量分析.
- 酵母突变体的功能补充,以评估输送活性.
- 用15N同位素标记的吸收动力学来确定动力学参数 (Km,Vmax).
主要成果:
- 在葡萄根中,VviAMT4;1的表达最高,在氨耗尽时显著上调.
- 酵母补充证实了VviAMT4;1作为高亲和度氨运输体的功能 (Km = 49.58 ± 4.66 μmol·L-1).
- VviAMT4;1 显示甲基胺的吸收较弱,以及内部氨基的潜在反抑制.
结论:
- VviAMT4;1在食用葡萄中的氨吸收和运输中起着重要作用,特别是在根组织中.
- 运输体对具有很高的亲和力,对的可用性有反应.
- 这些发现有助于理解水果树中运输机制,这对改善作物有意义.
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