外源的MgH2衍生能通过米中的m6ARNA甲基化减轻了的毒性
Peiran Wang1, Junfeng Cao2, Jiayu Lu1
1Anhui Province Key Laboratory of Rice Germplasm Innovation and Molecular Improvement (Rice Research Institute, Anhui Academy of Agricultural Sciences), Hefei 230031, PR China.
Journal of hazardous materials
|October 12, 2024
概括
化 (MgH2) 释放 (H2),通过调节基因表达和减少重金属积累,保护大米免受 (Cd) 压力. 这为工厂中的重金属整治提供了一个新的战略.
科学领域:
- 植物科学 植物科学
- 环境科学 环境科学
- 生物化学 生物化学
背景情况:
- (Cd) 污染严重影响作物产量和人类健康.
- 化 (MgH2) 作为 (H2) 捐赠体显示出减轻植物重金属压力的潜力,但其在中的作用尚不清楚.
研究的目的:
- 为了研究由MgH2供应的外源 (H2) 对 (Oryza sativa L.) 幼苗在 (Cd) 压力下的影响.
- 探索潜在的分子机制,包括反应性氧物种 (ROS) 平衡,H2恒温,光合作用和m6ARNA甲基化.
主要方法:
- 米幼苗的水培培养暴露于CdCl2.
- 用MgH2来缓释H2的应用.
- 测量ROS,内源H2和光合作用参数.
- 高性能液体染色学 (HPLC) 和甲基化RNA免疫沉测序 (MeRIP-seq) 用于分析m6ARNA甲基化水平和模式.
- RNA测序 (RNA-seq) 用于识别不同甲基化和表达基因.
主要成果:
- Cd压力抑制了大米的生长,但MgH2的外源H2通过恢复ROS平衡和光合作用功能来减轻这些影响.
- 在Cd压力下,H2显著降低了米中的m6ARNA甲基化水平.
- Cd压力改变了基因表达和m6A修饰模式,特别是在像开始子,停止子和3' UTR.这样的区域.
- 2治疗调节了参与ROS,压力反应,重金属运输和信号传递的基因的表达,包括MAPK通路.
结论:
- 由MgH2供应的外源H2通过通过m6ARNA甲基化调节基因表达来赋予米中的耐受性.
- H2通过降低与压力相关的基因的mRNA稳定性来减少Cd积累并增强植物平衡.
- 这项研究确定了开发策略的潜在候选基因,以纠正植物中的重金属污染.
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