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在miR164b-SiNAC015模块调节干旱耐受性通过扫除反应性氧气物种在狐尾小调节

Tong Xiao¹, Liang Ma¹, Yifan Zhang^1,2

¹State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing, China.

Plant biotechnology journal

|November 8, 2025

概括

微RNA 164b 对狐尾小米的干旱耐受性产生负面调节. 准这种微RNA及其下游NAC转录因子SiNAC015可以增强抗旱能力,为改善作物提供有价值的遗传资源.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
农业学是一种农业学.

背景情况:

干旱压力是全球作物生产的主要威胁,需要识别耐干旱品种.
了解植物干旱反应背后的分子机制对于开发弹性作物至关重要.

研究的目的:

研究miR164b对狐尾小米干旱耐受性的作用.
为了确定参与干旱应对的miR164b的下游目标.
探索miR164b-SiNAC015通路在改善狐尾小米抗干旱能力方面的潜力.

主要方法:

在干旱压力下进行基因表达分析.
转基因狐尾小米系 (过度表达MIR164b,STTM164,mSiNAC015) 的生成和分析.
对CRISPR/Cas9产生的突变体的分析 (sinac015).
使用生物信息学和实验验证的目标基因的识别.
评估与耐旱性相关的生理特征.

主要成果:

在干旱压力下,miR164b的表达下调,并对干旱耐受性产生负面影响.
过度表达MIR164b会降低干旱耐受性,而STTM164会增强干旱耐受性.
SiNAC015是miR164b的直接目标,在耐旱性方面发挥着积极作用.
SiNAC015抑制了参与反应性氧物种 (ROS) 清理的过氧酶 (POD) 基因 (SitPRX) 的表达.
一个优异的等位基因,SiNAC015^Hap1,由于表达更高,与增强的干旱耐受性有关.

结论:

miR164b-SiNAC015调节模块是调节狐尾小米干旱应激反应的关键参与者.
对这种途径的操纵,特别是增强SiNAC015活动,可以改善干旱耐受性.
这项研究为开发抗干旱的狐尾小米品种提供了宝贵的遗传资源.

关键词:

在SitPRXX上使用.干旱造成的压力是干旱.狐尾小米 (意大利)在 miR164b-SiNAC01515 中.有活性氧物种的反应性氧物种.

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