茎和根是玉米和Fusarium verticillioides之间的共同进化的主要战场
Hao Xiong1, Xiaobin Xing1, Muyuan Liu1
1Maize Research Institute, Sichuan Agricultural University, Sichuan, Chengdu, China.
Frontiers in plant science
|October 31, 2024
概括
玉米茎和根,而不是耳朵,是玉米和Fusarium verticillioides之间共同进化的主要地点. 这一发现改变了我们对这种重要作物的宿主-病原体相互作用的理解.
科学领域:
- 植物病理学 植物病理学
- 农业科学 农业科学
- 遗传学 是一个遗传学.
背景情况:
- 类物种是主要的病原体,对玉米 (Zea mays) 造成重大破坏,主要以耳朵腐烂而闻名,但也会影响茎和根.
- 症状-基因型相关性是宿主-病原体共同进化的关键指标,这表明主要相互作用部位应该显示最强的相关性.
研究的目的:
- 确定推动玉米和Fusarium物种之间的共同进化的主要相互作用地点.
- 调查不同玉米器官 (耳朵,茎,根) 上的Fusarium分离物的症状-基因型相关性.
主要方法:
- 从受感染的玉米耳中分离和识别了43种Fusarium物种,其中Fusarium verticillioides和F. graminearum占主导地位.
- 接种了14种精英玉米与43种Fusarium隔离物杂交.
- 评估耳朵腐烂,茎腐烂和根腐烂症状,以确定症状严重程度和基因型相关性.
主要成果:
- 在所有测试的器官中,Fusarium graminearum通常会引起更严重的症状.
- Fusarium verticillioides分离物表现出强烈的症状-基因型相关性与茎腐烂和根腐烂,但不是耳朵腐烂.
- 这表明茎和根组织对F. verticillioides-maize共同进化的动态更为关键.
结论:
- 这项研究提供了新的证据,即玉米茎和根,而不是耳朵,是玉米和Fusarium verticillioides之间的共同进化的主要舞台.
- 这挑战了对耳朵腐烂的传统关注,并强调了在玉米疾病管理和育种中考虑地下和茎相互作用的重要性.
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