一种植物病毒的防御介导的体限制有助于昆虫的传播
Yuzhen Mei1,2, Yaqin Wang2, Fangfang Li1
1State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Nature communications
|December 23, 2025
概括
导致作物疾病的植物病毒通过PENETRATION3 (PEN3) 活动被限制在花组织中. 这种浮膜的限制有利于昆虫的传播,增强病毒的传播和影响粮食安全.
科学领域:
- 植物病理学 植物病理学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 植物病毒,特别是由昆虫传播的病毒,经常表现出组织热带性,经常局限于叶膜.
- 这种浮膜限制的潜在机制和生态意义在很大程度上是未知的.
- 了解病毒组织热带性对于管理植物疾病和确保粮食安全至关重要.
研究的目的:
- 为了阐明烟草卷发病毒 (TbCSV) 膜限制的机制.
- 研究C4基因和PENETRATION3 (PEN3) 在病毒组织热带性中的作用.
- 为了确定浮膜限制对病毒传播和宿主范围的影响.
主要方法:
- 对具有不同C4基因等位基因 (Y35和Y41) 的TbCSV菌株进行比较分析.
- 对焦显微镜用于追踪病毒运动和蛋白质定位.
- 酸防御通路分析和质沉积试验.
- 评估昆虫媒介病毒的获取和传播情况.
主要成果:
- C4基因的Y35等位基因导致一个限于花的TbCSV菌株.
- Y41等位基因,C4变异向血膜和叶绿体,导致病毒从叶膜逃逸.
- 叶绿体局部化的C4破坏了酸防御,破坏了PEN3的稳定性,减少了,并扩大了宿主范围.
- 对TbCSV的体限制 (Y35) 增强了昆虫载体的获取和传播.
- 在RNA病毒中,PEN3还调解了花限制.
结论:
- PEN3活性和质沉积是将病毒限制在体中的关键因素.
- 膜限制通过促进昆虫载体传播,为病毒提供了竞争优势.
- 了解这些机制对于开发控制植物病毒病的策略至关重要.
相关概念视频
02:26Defenses Against Pathogens and Herbivores
29.4K
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.
29.4K
02:22Introduction to Plant Diversity
48.4K
From Water to Land
48.4K
02:40Epiphytes, Parasites, and Carnivores
16.5K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
16.5K
00:56Viral Structure
73.6K
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
73.6K