24-Epibrassinolide对玉米 (Zea mays L.) 干旱应激适应的生理和生化影响
Bicky Kumar1,2, Madan Pal2, Pranjal Yadava1,2
1Pusa Campus, ICAR-Indian Institute of Maize Research, New Delhi, India.
PeerJ
|April 1, 2024
概括
植物激素24-Epibrassinolide (EBR) 通过改善生理和生化反应,提高了玉米杂交品种的干旱耐受性. 在EBR的叶子应用减轻了关键的开花阶段干旱压力的不良影响.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 生物化学 生物化学
背景情况:
- 玉米产量受到干旱压力的重大影响,特别是在雨的热带和亚热带地区.
- 干旱对玉米的关键生理和生化过程产生负面影响,导致作物产量减少.
- 了解植物激素对干旱耐受性的影响对于开发有弹性的作物品种至关重要.
研究的目的:
- 研究24-Epibrassinolide (EBR) 对两种玉米杂交品种干旱耐受性的生理和生化影响.
- 评估EBR在缓解干旱引发的压力中的有效性.
主要方法:
- 两种玉米杂交 (Vivek杂交9和Bio 9637) 经受灌,干旱和干旱+EBR条件.
- 干旱压力是由于在合成前两周保留灌而引起的.
- 在干旱+EBR治疗组中,EBR被用作叶子喷雾剂.
主要成果:
- 干旱显著降低了光合作用速率,膜稳定性指数,叶面积指数,相对水含量和叶子水潜力,对生物9637.com的影响更大.
- 在干旱期间,抗氧化酶活性 (CAT,APX,SOD) 增加;EBR进一步在Vivek混合物9中将CAT活性提高了23%.
- 在干旱期间,EBR应用减轻了干旱的有害影响,在 Bio 9637 中,proline 增加了 86%,glycine betaine 增加了 70%.
结论:
- 对外应用的24-Epibrassinolide (EBR) 提高了玉米杂交品种的干旱耐受性.
- EBR改善生理和生化参数,抵消干旱引起的压力.
- 化前EBR的叶子应用提供了一种潜在的策略,可以减轻玉米开花期间干旱的影响.
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