老麦种子的发芽与抗氧化酶活性和储存化合物调动变化相关
Kun Yi1, Jiaming Yue1, Shuangfeng Yang1
1Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China.
Physiologia plantarum
|October 26, 2023
概括
陈旧的麦种子表现出改变的新陈代谢,具有增加的抗氧化酶活性和可溶糖和蛋白质的转变,通过特定的代谢途径促进发芽.
科学领域:
- 植物生理学 植物生理学
- 生物化学 生物化学
- 种子科学 种子科学
背景情况:
- 种子老化显著影响发芽和生理过程.
- 了解老化种子的代谢变化对于提高作物产量至关重要.
研究的目的:
- 为了研究生理和代谢变化控制和老化麦 (Avena sativa) 种子在发芽期间.
- 确定关键的代谢途径和参与老种子发芽的化合物.
主要方法:
- 在各种浸泡时间测量了麦种子胚胎和内的抗氧化酶活性 (超氧化脱酶,催化酶) 和储存化合物水平 (糖,蛋白质,脂肪).
- 分析了对照胚胎和老化的种子中的代谢变化.
- 人工加速老化被用来创建中等活力老化的种子.
主要成果:
- 在晚些时候的浸泡阶段,老化的麦种子显示出超氧化物脱酶和触酶活性增加.
- 在老化的种子中,可溶糖含量下降,而蛋白质含量增加,观察到曼尼托尔和蛋白的产生.
- 在老化的种子中,脂肪的调动通过脂代谢途径发生,产生二氨酸-1-酸盐.
- 在经过60小时的浸泡后,老化的种子中, Askorbic 酸,Avenanthramide 和 Proline 的水平显著增加.
结论:
- 代谢重编程,包括增强抗氧化防御和改变营养调动,对于老麦种子发芽至关重要.
- 特定的代谢物,如曼尼托尔,,酸和阿维南特拉米德,在克服老种子中发芽障碍方面发挥着关键作用.
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