黑色素增强玉米发芽,生长和盐耐受性,通过调节反应性氧物种积累和抗氧化系统来提高
Wei-Qing Li1, Jia-Yu Li1, Shao-Jie Bi2,3
1College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
Plants (Basel, Switzerland)
|January 25, 2025
概括
黑色素治疗显著改善了玉米的盐分耐受性,通过增强幼苗的生长,度调节和抗氧化系统. 这项研究为使用美拉来促进盐水土壤中的作物生产提供了基础.
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:
- 无生物压力,特别是盐度,严重影响了玉米的生长和产量.
- 众所周知,黑素 (MT) 在压力下调节植物生长,但其结合种子和叶子应用对玉米盐分耐受性的影响尚不清楚.
研究的目的:
- 调查黑激素种子启动和外源喷雾处理对玉米发芽和苗木盐耐受性的综合影响.
- 阐明黑激素在减轻玉米盐应激中的作用的潜在生化和生理机制.
主要方法:
- 玉米品种Zhengdan 958和Demeiya 1经过盐应激 (100mM NaCl) 经历了不同度的黑色素.
- 评估了幼苗生长特征,度调节,抗氧化酶活性,光合作用色素,离子含量,活性氧物种 (ROS) 水平和基因表达.
主要成果:
- 盐应激抑制了玉米的发芽和生长,增加了H2O2和O2水平,同时降低了抗氧化酶活性和光合作用颜料.
- 外源性黑激素通过降低Na+含量和ROS水平来缓解盐诱导的生长抑制,膜损伤和氧化应激.
- 黑色素治疗增强了抗氧化酶活性和关键抗氧化基因 (ZmSOD4,ZmCAT2,ZmAPX2) 的表达.
结论:
- 结合的黑素种子和叶子处理有效地减轻了盐应激对玉米的不良影响.
- 黑色素通过改善度调节,抗氧化防御和基因表达来增强玉米的盐分耐受性.
- 这项研究为利用黑激素作为可持续农业投入的理论基础,用于盐受影响的土壤中种植的作物.
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