相关实验视频
Updated: Jun 8, 2025
08:10
Environmentally Induced Heritable Changes in Flax
Published on: January 26, 2011
10.2K
中的压力记忆:母亲对种子新陈代谢和后代生长和生理学的影响
Catalina Castro1, Javiera Rojas1, José Ortíz1
1Laboratorio de Fisiología Vegetal, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile.
Physiologia plantarum
|November 8, 2024
概括
花植物表现出压力记忆,将 (N) 限制效应传递给后代. 孕产妇的低N条件提高后代的生长和弹性,这表明作物的自然原始化策略.
科学领域:
- 植物生理学 植物生理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 农作物科学 农作物科学
背景情况:
- 植物发展压力记忆,这是一个先前暴露于压力的现象,可以增强后续反应.
- 这种压力记忆可以跨代传递 (跨代记忆).
- (N) 限制是影响作物生产率的显著非生物压力.
研究的目的:
- 调查母体 (N) 条件在 (Chenopodium quinoa) 后代反应塑造中的作用.
- 为了确定昆是否表现出与N可用性相关的跨代压力记忆.
- 探索由母亲的N状态影响后代的生理和代谢适应.
主要方法:
- 昆 (F0) 植物在高 (HN) 和低 (LN) 条件下种植.
- 这些母植物的种子被收集并用于在HN和LN两种条件下生长后代 (F1).
- 分析了生理参数 (光合作用,生物质,根部发育) 和种子组成 (蛋白质,氨基酸,脂质).
主要成果:
- 母植物的低N (LNF0) 导致产量和光合作用减少,但改变了种子组成 (脂质增加,发芽速度更快).
- 来自LNF0母亲的后代 (F1) 显示了增强的生物质和根部发育,特别是在LNF0条件下.
- 在LNF0LNF1幼苗中的这些改善与更高的光合作用率和粉含量相关,表明CO2固定得到改善.
结论:
- 昆表明母体N压力信息的跨代传播,增强后代的弹性.
- 孕产妇的N条件起到启动机制的作用,改善后代的生理和代谢表现.
- 这项研究强调了使用母体环境史来增强作物适应营养压力的潜力.
相关概念视频
02:02Responses to Salt Stress
13.0K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.0K
01:40Overview of Metabolism
29.5K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.5K
02:45Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K
02:35Key Elements for Plant Nutrition
18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K
02:41Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
01:57Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K