抗氧化剂的产生促进了Zea mays在非生物应激下的防御机制和不同的基因表达水平
Qurban Ali1, Adnan Sami2, Muhammad Zeshan Haider2
1Department of Plant Breeding and Genetics, Faculty of Agriculture, University of the Punjab, Lahore, 54590, Pakistan. saim1692@gmail.com.
Scientific reports
|March 27, 2024
概括
玉米的生长受到盐度和干旱的阻碍. 在压力下观察到catalase产量的增加,而过氧化,超氧化物脱酶和malondialdehyde水平下降,表明玉米的复杂抗氧化反应.
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 (Zea mays) 的生产力受到土壤盐度的显著影响,影响了发芽和苗木建立等关键阶段.
- 在盐应激下了解玉米的氧化和抗氧化防御机制对于提高作物弹性至关重要.
研究的目的:
- 为了研究盐诱导的玉米品种Raka-Poshi的氧化和抗氧化反应.
- 评估不同化 (NaCl) 度和干旱压力对生物化学标记物和基因表达的影响.
主要方法:
- 在温室条件下,对玉米苗进行了30天的NaCl度 (0-150mM) 和干旱压力 (50%的灌减少) 的测试.
- 测量了生物化学指数,包括脂类过氧化酶 (马隆迪甲基 - MDA),谷氨减氧化酶 (GR),瓜亚醇过氧化酶 (GPOD),过氧化 (H2O2),超氧化物失调化酶 (SOD),氧化酶 (LOX),催化酶 (CAT),酸盐过氧化酶 (APOD) 和谷氨-S转移酶 (GST).
- 分析了九种酶相关基因的形态参数和基因表达.
主要成果:
- 在150mM NaCl和50%的干旱压力下,观察到47%的生长减少.
- 随着NaCl度的升级和干旱压力,catalase的产量增加.
- 在增加压力下检测到较低的H2O2,SOD和MDA水平,而根和芽的长度下降,根与芽的重量比在干旱下增加,但在盐的压力下降.
- 基因表达分析显示,在干旱压力下,所有九个酶相关基因都出现了一致的下调.
结论:
- 玉米对盐度和干旱压力表现出复杂的氧化和抗氧化反应.
- catalase在减轻压力方面发挥着重要作用,而其他标记物如H2O2,SOD和MDA可能表明适应性策略或损伤值.
- 干旱压力显著降低了玉米中关键酶相关基因表达的调节.
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