相关实验视频
Updated: Jan 28, 2026

06:34
Virus-induced Gene Silencing VIGS in Nicotiana benthamiana and Tomato
Published on: June 10, 2009
53.9K
空气中的β-caryophyllene通过启动番茄防御系统来破坏病毒载体相互关系
Peng-Jun Zhang1, Rui-Chen Li1, Ye-Hua Li2
1College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
概括
番茄植物在受到白的攻击时释放β-caryophyllene. 这种空中传递的信号为附近的植物提供病毒耐药性,改善作物防御,并可能有助于对耐药品种的繁殖.
科学领域:
- 植物病理学 植物病理学
- 昆虫学 昆虫学是一门学科.
- 化学生态化学生态学
- 分子植物育种 分子植物育种
背景情况:
- 白 (Bemisia tabaci) 传播贝戈莫病毒,通过病毒大流行在全球范围内造成重大作物损失.
- 现有的植物对白和病毒的抵抗机制尚未完全理解,这阻碍了耐药作物品种的发展.
- 白和贝戈莫病毒之间的复杂互惠关系加剧了害虫入侵和疾病传播.
研究的目的:
- 研究番茄植物在应对白感染时释放的挥发性有机化合物 (VOC) 的作用.
- 阐明植物对贝戈莫病毒的主要防御机制.
- 探索β-caryophyllene作为一种提高作物耐药性和综合性害虫防治工具的潜力.
主要方法:
- 在感染病毒性白 (Bemisia tabaci) 时,从种植的番茄植物中排放的挥发性排放的分析.
- 在暴露于β-caryophyllene的邻近番茄植物中对抗病毒防御原料的评估.
- 利用转基因番茄系列过度生产β-caryophyllene和合成β-caryophyllene剂器,以确认防御原料和植物适应性.
- 评估不同番茄品种的基因型特异性防御反应.
主要成果:
- 病毒性白会诱导番茄植物中强烈的,早期释放的甲β-甲.
- β-Caryophyllene 作为一种空气中传递的信号,使邻近植物对贝戈莫病毒 (例如,番茄黄色叶子卷曲病毒) 增强抵抗力.
- 暴露于β-Caryophyllene也增强了寄生虫Encarsia formosa的吸引力,表明了多方面的防御策略.
- 在持续的白入侵下,原料植物表现出更好的适应性,其影响是基因型特异性的.
结论:
- 番茄植物在暴露于由β-caryophyllene介导的病毒性白时,优先考虑抗病毒防御而不是抗草食者反应.
- 以β-Caryophyllene为媒介的防御初始化提供了一种基于挥发性的新机制,以抵消白病毒互惠.
- 这一发现为通过选择性育种和利用β-caryophyllene开发耐药番茄品种为综合性害虫和疾病管理提供了基础.
相关概念视频
Mutual Inductance
3.7K
Inductance is the property of a device that tells us how effectively it induces an emf in another device. In other words, it is a physical quantity that expresses the effectiveness of a given device.
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
3.7K
Defenses Against Pathogens and Herbivores
29.6K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
29.6K
Defense Against Bacterial Pathogens
2.8K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
2.8K
Defense Mechanism Against Infection
9.6K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
9.6K
What are Viruses?
128.0K
Overview
128.0K
Transmission-based Precautions II: Airborne and Protective Environment
1.9K
Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
1.9K

