转录和生理学分析显示,尼古提安胺增强了小麦对过多的耐受性
Daozhen Luo1, Qing Li1, Fei Pang1
1Guangxi Key Laboratory of Agro-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, China.
iScience
|October 28, 2025
概括
尼古胺 (NA) 的生物合成和运输通过调节Mn的积累和保持基本的阳离子平衡来提高小麦中 (Mn) 的耐受性. 参与NA代谢和运输的基因是培育耐Mn小麦品种的关键标.
科学领域:
- 植物生物学 植物生物学
- 农业科学 农业科学
- 生物化学 生物化学
背景情况:
- (Mn) 对植物至关重要,但在高水平上有毒.
- 尼古丁胺 (NA) 在小麦Mn排毒中的作用尚不清楚.
研究的目的:
- 研究NA生物合成和运输在小麦Mn耐受性中的作用.
- 确定与Mn耐受性相关的基因.
主要方法:
- 对Mn耐受性和Mn敏感性小麦品种在过剩的Mn下进行的比较转录和生理分析.
- 外源NA在水栽培中的应用实验.
主要成果:
- 在Mn压力下,耐Mn的小麦显示尼古丁胺氨基合成酶 (TaNAS),尼古丁胺氨转移酶 (TaNAAT) 和Mn-NA载体 (TaYSL2,TaYSL6) 的表达增加.
- 根部中NA水平升高与耐受性相关.
- 外源NA提高了Mn的耐受性,减少了Mn的积累,并维持了阴位稳定.
结论:
- 对于小麦的Mn耐受性来说,NA生物合成和运输至关重要.
- 候选基因 (TaNAS,TaNAAT,TaYSL2,TaYSL6) 可以作为培育耐Mn小麦的目标.
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