外源比醇的应用通过对抗氧化剂系统的升级调节和内源比醇生物合成,使玉米幼苗能够耐旱
Jun Li1, Meiai Zhao2, Ligong Liu3
1College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China.
Plants (Basel, Switzerland)
|July 14, 2023
概括
外源比醇的应用通过促进透物质积累和抗氧化系统,显著提高了玉米幼苗的干旱耐受性. 这有助于在聚乙烯糖醇 (PEG) 模拟的干旱压力下改善玉米的生长.
科学领域:
- 植物生理学 植物生理学
- 生物化学 生物化学
- 农业科学 农业科学
背景情况:
- 干旱压力显著抑制了玉米幼苗的生长.
- 聚乙烯甘醇 (PEG) 通常用于模拟实验室环境中的干旱条件.
- 外源性应用的氧化物,如比醇,可以减轻干旱压力影响.
研究的目的:
- 调查外源性比醇对受到PEG模拟干旱压力的玉米幼苗的影响.
- 为了确定索尔比托的最佳度,以减轻干旱压力.
- 为了阐明底层的生理和分子机制索尔比托尔诱导的干旱耐受性.
主要方法:
- 在PEG诱导的干旱压力下,对玉米苗进行了不同度的位治疗.
- 测量了生长参数,生化指标 (可溶糖,蛋白质,素,AsA,GSH) 和氧化应激标志物 (MDA,H2O2,REC).
- 评估了抗氧化酶活性和阿尔多减少酶活性.
- 使用定量实时PCR (qRT-PCR) 来分析与阿尔多缩酶 (AR) 相关基因的表达.
主要成果:
- 外源比醇显著减轻了玉米幼苗中PEG诱导的生长抑制,其中10毫米比醇显示出最佳结果.
- 索尔比托治疗增加了透物质的含量,相对的水含量和抗氧化酶活动,同时减少了氧化损伤标志物.
- 在干旱压力下的sorbitol治疗苗木中,AR相关基因的表达显著上调.
结论:
- 外源比醇使玉米幼苗能够耐受干旱.
- 索尔比托尔通过调节AR相关基因,促进透调整和改善抗氧化剂防御系统来增强耐旱性.
- 这些发现表明,在干旱环境中提高作物弹性是一个有前途的战略.
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