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OSNRT1.1B-OSCNGC14/16-CA²⁺-OSNLP3路径:化介导的维持同位

Xiaohan Wang¹, Yongqiang Liu^1,2, Weiwei Li^1,3

¹Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|September 3, 2025

概括

在现有的酸盐反应机制之外,大米植物还利用一种新的信号通路. 这种双重系统提高了酸盐的直接吸收和长期使用效率.

科学领域:

植物分子生物学
植物生理学
的代谢

背景情况:

酸盐对于植物生长至关重要,
NRT1.1-NLP途径是阿拉比多普西斯和大米等植物中酸盐信号的主要已知机制.
短期酸盐反应和长期利用之间的相互作用尚未完全理解.

研究的目的:

研究大米中的酸盐信号通路.
探索一次性酸盐反应 (PNR) 和长期利用之间的功能相互作用.
阐明信号在酸盐反应中的作用.

主要方法:

酵母双杂交测定和共免疫沉以确定蛋白质复合物.
用于测量流量的电生理记录.
定量PCR用于评估基因表达.
使用质谱测量进行酸化部位分析.

主要成果:

在大米根尖中发现了一种涉及OsCNGC14,OsCNGC16和OsNRT1.1B的新型血局部复合体.
这种复合物调解了酸盐引发的流,这对PNR至关重要.
OsNLP3的OsNRT1.1B-OsCNGC14/16复合体依赖酸化加速了其核转位和基因激活.
Ca2+-OsNLP3通路放大了酸盐信号,补充了无处不在介导的OsSPX4通路的稳定.

结论:

具有对信号的双重调节网络,包括依赖和依赖无处不在的通路.
Ca2+-OsNLP3通道提供了酸盐信号的快速放大,增强了短期PNR.
这种新发现的途径对大米的短期酸盐反应和长期利用有很大影响.

关键词:

Ca2+信号传输酸盐信号稳态化大米

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