能否减轻PEG 6000引起的水不足,使种子在发芽和生长的过程中获得初始的水分?
L I S Sousa1, A E A Brito1, L C Souza1
1Universidade Federal Rural da Amazônia - UFRA, Instituto de Ciências Agrárias, Grupo de Estudos da Biodiversidade em Plantas Superiores, Laboratório de Fisiologia Vegetal, Belém, PA, Brasil.
概括
的应用并没有改善玉米苗的发芽或在水应激条件下的生长. 水资源短缺显著减少了苗木生物量和发展,这表明.
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:
- 水压是玉米 (Zea mays L.) 产量的主要限制,影响了发芽,生长和营养吸收.
- 已知 (Si) 可以增强植物对各种非生物应激的耐受性.
研究的目的:
- 研究酸在减轻水不足压力对玉米发芽和苗木发展的有效性.
- 在模拟干旱条件下评估对生理参数的影响.
主要方法:
- 实验室实验使用完全随机的因子设计 (3酸度×4 PEG-6000透潜力).
- 评估发芽率,发芽速度指数 (GSI),平均发芽时间 (MGT),苗木长度和干物质 (射出,根,总量).
主要成果:
- 由于缺水,发芽率,GSI和MGT显著降低.
- 在缺水条件下,苗芽发芽,根和总干燥物质减少了70-87%以上.
- 酸的应用并没有减轻水压对玉米苗的负面影响.
结论:
- 在测试条件下,补充剂不会对玉米苗的缺水压力产生耐受性.
- 可能需要进一步的研究来探索不同的来源或用于玉米耐旱的应用方法.
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