黄-抗氧化酶相互作用 调节葡萄皮适应紫外线辐射 在果发育过程中
Chenxing Su-Zhou1, Yijie Zhao2, Mingyuan Zheng1
1College of Enology, Northwest A&F University, Yangling, Shaanxi, China.
Physiologia plantarum
|October 27, 2025
概括
气候变化引起的紫外线辐射会影响葡萄酒的新陈代谢. 增加紫外线B辐射暴露会增加葡萄的黄酸和酸氨酸水平,特定的黄酸调节抗氧化酶活性,用于UV适应.
科学领域:
- 植物生理学 植物生理学
- 环境科学环境科学
- 生物化学 生物化学
背景情况:
- 气候变化正在增加紫外线 (UV) 辐射水平.
- 紫外线辐射显著影响植物的二次新陈代谢,特别是在葡萄树上.
- 了解葡萄酒对紫外线的反应对于葡萄种植和可持续性至关重要.
研究的目的:
- 为了研究葡萄树果对不同紫外线照射在现场条件下的反应.
- 评估紫外线辐射对黄类积累,抗氧化酶活性和葡萄皮基因表达的影响.
- 为了阐明葡萄树中紫外线适应的机制.
主要方法:
- 使用光学过器修改紫外线光谱的实地实验 (2020-2021年).
- 在葡萄皮中分析黄和酸的度.
- 测量抗氧化酶活动 (APX,POD).
- 相关性和结构方程建模以分析代谢物和酶之间的关系.
主要成果:
- 扩展的紫外线光谱 (包括UV-B) 增加了黄醇和氨酸度.
- 紫外线暴露改变了黄化合物的组成,特别是在经过检查后.
- 黄醇配置文件和抗氧化酶活性之间存在强烈的相关性.
- 特殊的黄醇结构差异调节的抗氧化酶:三氧黄醇对APX产生负面影响,而二和三氧黄醇对POD产生积极影响.
结论:
- 葡萄藤紫外线适应涉及协调的代谢和酶反应.
- 黄醇在以结构依赖的方式调节酶性抗氧化剂系统中发挥着积极的作用.
- 研究结果提供了对紫外线耐受性的葡萄藤生理机制的见解.
- 结果支持制定葡萄种植战略,以改善果质量和葡萄园在气候变化下的可持续性.
相关概念视频
Oxidation of Phenols to Quinones
4.5K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
4.5K
Role of Skin in Vitamin D Synthesis
7.5K
The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
7.5K
Radical Autoxidation
3.1K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
3.1K
Pigmentation
4.1K
The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
4.1K
Photoreceptors and Plant Responses to Light
28.3K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
28.3K
UV–Vis Spectroscopy of Conjugated Systems
8.2K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in...
One of the factors influencing λmax is the extent of conjugation in...
8.2K


