米中的NADP依赖的酸脱酶基因OsMDH8.2与耐热性有关
Min Jiang1, Zhang Chen1, Ebenezer Ottopah Ansah1
1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Joint International Research Laboratory of Agriculture & Agri-Product Safety, Yangzhou University, Yangzhou 225009, China.
Fundamental research
|January 30, 2026
概括
过度表达OsMDH8.2的水植物表现出增强的耐热性. 该基因通过调节能量恒温和口腔关闭来改善热应激下的生物质产量和光合作用活动.
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:
- 植物进化了适应高温的机制,防止作物产量损失.
- 依赖NADP的酸脱酶 (NADP-MDH) 对于植物的新陈代谢至关重要.
- 米NADP-MDH (OsMDH8.2) 在热应激反应中的作用以前是未知的.
研究的目的:
- 为了研究在热应激下在大米中OsMDH8.2的功能.
- 描述奥斯MDH8.2介导的耐热性背后的生理和分子机制.
主要方法:
- 产生和分析过度表达OsMDH的转基因大米谱系8.2.2.
- 淘汰赛OsMDH8.2线路的分析.
- 包括生物质,表面温度和光合作用活动在内的生理测量.
- 对过氧化酶活性和过氧化含量的生物化学测定.
- 转录组和代谢组分析.
主要成果:
- 过度表达OsMDH8.2提高了热适应性,保持生物质和光合作用活动.
- 转基因线因口腔关闭而表现出较低的表面温度.
- OsMDH8.2降低过氧化水平并影响过氧化酶活性.
- 淘汰赛线路证实了OsMDH8.2对耐热性的贡献.
- OsMDH8.2通过调节TCA和氧酸盐循环和氨基酸代谢来维持能量稳态.
结论:
- OsMDH8.2是提高大米耐热性的一个关键因素.
- OsMDH8.2通过优化能量代谢和减少氧化损伤,改善植物适应热应激.
- OsMDH8.2的基因工程为开发适应气候变化的作物提供了一个有希望的战略.
更多相关视频
05:05Heat Tolerance Assays Using the Drosophila Activity Monitor System: A Guide to an Executable Application for Data Analysis
Published on: December 13, 2024
1.0K
09:43Author Spotlight: Streamlining Rice Breeding with CRISPR/Cas for Obtaining Optimal Phenotypic and Agronomic Traits
Published on: January 3, 2025
3.5K
相关概念视频
02:46Quantifying Heat
62.1K
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the...
62.1K
02:45Responses to Heat and Cold Stress
14.8K
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.
14.8K
02:44Heating and Cooling Curves
27.8K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
27.8K
01:16Specific Heat
67.4K
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
67.4K
01:58Cell Specific Gene Expression
16.5K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.5K
01:12Heat Flow and Specific Heat
6.8K
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is...
6.8K