在米黄色矮人植物质基因组中编码的病毒效应因子参与病变发生
Shuai Zhang1, Peng Gan1, Huiting Xie1,2
1State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, Vector-borne Virus Research Center, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Plant physiology
|November 7, 2024
概括
这项研究揭示了米黄矮体植物质 (RYD) 如何使用效应蛋白RY348和RY378来破坏植物发育,导致花粉无菌并增加米的耕作.
科学领域:
- 植物病理学 植物病理学
- 微生物学 微生物学
- 基因组学就是基因组学.
背景情况:
- 植物质体是植物致病性细菌,在植物和昆虫宿主之间交替存在.
- 它们分泌效应蛋白来操纵宿主发育,造成农业的重大损失.
- 由"Candidatus Phytoplasma oryzae"引起的黄矮体疾病 (RYD) 影响了全球的米生产.
研究的目的:
- 为了测序"候选植物菌"菌株HN2022.e的完整基因组.
- 为了识别和描述负责RYD疾病症状的关键病毒效应因子蛋白.
- 阐明这些效应因子破坏植物发育的分子机制.
主要方法:
- 使用PacBio HiFi技术进行全基因组测序.
- 生物信息分析包括SignalP v5.0用于效应器预测.
- 在 *Nicotiana benthamiana* 和大米 (*Oryza sativa* L.) 中对效应蛋白的异质表达和功能分析.
主要成果:
- 测序了"Candidatus Phytoplasma oryzae" HN2022 (16Sr XI-B子组) 的完整基因组.
- 确定了两个关键的毒性效应蛋白,RY348和RY378.
- RY348降解了MADS盒转录因子 (MADS1,MADS15),导致花粉无菌.
- RY378破坏了strigolactone和auxin的信号传递,导致了增加的耕作.
结论:
- 已确定的效应蛋白RY348和RY378对于米中的植物质病毒性和症状发展至关重要.
- RY348对MADS盒子因子的降解为花粉无菌提供了分子基础.
- RY378对荷尔蒙通路的影响解释了观察到的耕种表型,为植物-植物等离子体相互作用提供了洞察力.
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