酸酶在线粒体功能和干旱压力反应中的作用 在大米中
Suping Ying1, Jiawei Niu1, Jing Yang1
1Key Laboratory of Molecular Biology and Gene Engineering of Jiangxi Province, College of Life Science, Nanchang University, Nanchang, 330031, China.
Plant physiology and biochemistry : PPB
|September 12, 2025
概括
溶性酸盐酶OsPPa3对于抗干旱,维护线粒体功能和通过OsWRKY50.50调节叶绿素基因至关重要. 这一发现为开发抗压作物提供了一个新的目标.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 可溶性酸盐酶 (sPPase) 是植物应激反应的关键.
- 它在线粒体功能中的作用尚不清楚.
研究的目的:
- 研究大米中OsPPase基因的功能.
- 阐明OsPPa3在线粒体功能和干旱应激耐受性中的作用.
主要方法:
- 在大米中基因识别和淘汰.
- 线粒体功能测定 (膜潜力,ATP水平,ROS).
- 干旱压力生理测量.
- 转录组分析和基因表达研究 (Y1H,双露西法酶).
主要成果:
- OsPPa3淘汰赛损害了线粒体功能,并增加了反应性氧物种 (ROS).
- osppa3突变体对干旱压力的敏感性增加.
- OsPPa3通过转录因子 OsWRKY50.3 调节采光叶绿素基因 (OsLhca/OsLhcb).
- OsWRKY50直接与OsLhcb5促进体结合并激活其表达.
结论:
- 通过维持线粒体能量恒温,OsPPa3增强了对大米干旱的抵抗力.
- OsPPa3 调节叶绿素生物合成和 ROS 清理途径.
- OsPPa3-OsWRKY50通路对于大米的压力耐受性至关重要,为作物改善提供了目标.
相关概念视频
Responses to Drought and Flooding
11.9K
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.
11.9K
Responses to Heat and Cold Stress
14.7K
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.
14.7K
Responses to Salt Stress
14.5K
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.
14.5K
Other Stress Responses in Bacteria
347
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
347
Regulation of Transpiration by Stomata
30.9K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
30.9K
Overview of Metabolism
37.7K
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...
37.7K


