外源铜类固醇和酸在调节玉米冷应激耐受性的机制
Tao Yang1,2,3, Zelong Zhuang1,2,3, Jianwen Bian1,2,3
1College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China.
International journal of molecular sciences
|April 17, 2025
概括
外源酸 (ABA) 和酸 (BR) 疗法通过增强抗氧化活性来改善玉米苗的寒冷耐受性. 然而,ABA和BR联合治疗没有显示出对玉米冷压的显著额外益处.
科学领域:
- 植物科学 植物科学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 寒冷压力对玉米幼苗的生长和生存有重大影响.
- 已知外源酸 (ABA) 和酸 (BR) 可减轻植物中的非生物压力.
- 了解ABA和BR在寒冷压力下的相互作用对于改善玉米寒冷耐受性至关重要.
研究的目的:
- 研究外源ABA,BR的生理和分子效应,以及它们在寒冷压力下对玉米幼苗的联合应用.
- 在寒冷条件下识别参与玉米对ABA和BR反应的关键基因和途径.
主要方法:
- 玉米幼苗经过外部ABA,BR或联合ABA+BR (AR) 处理,经过冷应力 (10°C) 处理.
- 评估了生理特征,包括生长,抗氧化酶活性和奥斯莫利特合成.
- 转录组分析和权重基因联合表达网络分析 (WGCNA) 用于识别响应基因和途径.
主要成果:
- 寒冷压力抑制了玉米幼苗的生长,但外源性ABA和BR治疗增强了抗氧化酶活动和氧化物合成,减轻了压力.
- 与单个治疗相比,联合AR治疗并没有显著改善耐寒性.
- 转录组分析显示了植物激素信号转导,脂肪酸延长和烯胺生物合成途径的参与.
- 四个候选基因 (Zm00001eb343270,Zm00001eb401890,Zm00001eb206790,Zm00001eb199820) 被确定为在寒冷压力下对ABA和BR的反应.
结论:
- 外源ABA和BR单独通过生理调整提高玉米的寒冷耐受性.
- 在寒冷压力下ABA和BR之间的相互作用涉及特定的信号和代谢途径.
- 鉴定的候选基因为调节玉米对ABA和BR的耐寒性反应的分子机制提供了洞察力.
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